Plot

The Mask chases Pretorius on a train which Pretorius is carrying a plutonium with him, and The Mask stops him in the end, but not before pulling wedgies on Kellaway and Doyle. Stanley talks to Dr. Neuman about last night remembering the memories of that he was singing with his hands full of plutonium, that he wretched his back during the limbo, and didn't get any sleep last night because of The Mask partying till dawn again but he admits that he saved the city even though The Mask gave the entire police squad wedgies, while Dr. Neuman is distracted doing crosswords, but he asks Stanley, did he just say Wedgies? Stanley tells him that he wouldn't mind giving the mask away, but there's no one he trusts it with, and Dr. Neuman tells him that he finds his fantasies intriguing, and he recommends to him that he visits a safe haven for them. Stanley asks him does he not believe that The Mask is real, and he tells him that he'll believe him if he promises to go away, which Stanley asks him, if he thinks he's crazy and Dr. Neuman tells him that he doesn't think he is crazy and that he is making it all up because he enjoys annoying him, so he tells him to leave which he does. Stanley decides to prove to him that The Mask is real and a phone rings which Dr. Neuman answers it and is asked to examine a criminally insane prisoner which he tells them on the other end of the phone that after dealing with Stanley, it will be a relief and seven o clock in the evening is fine for him. Stanley puts on the mask and The Mask jumps out of the apartment to show himself to Dr. Neuman to prove Stanley is right, but however several things got in the ways like cement from a truck which froze him solid when he was about to blow a horn on Dr. Neuman and he goes on the Maskmobile to run alongside the train where Dr. Neuman is in which he starts to make a scene to get his attention, but however another train came through and run him over which Dr. Neuman misses the chance to see him, and Milo comes over and puts a frisbee on him to cheer him up, but it does not work. The Mask sees Dr. Neuman coming out of the train station and is about to show himself to Dr. Neuman that he is real, but Kellaway passes by which he insulted him so The Mask decides to pull wedgies on him and the police officer next to him which he goes in a whirlwind while being chased by them. Dr. Neuman returns to his home and The Mask decides to give up, so he takes his face off, and Stanley rushes over to Dr. Neuman begging him to take the mask, telling him that he is the only one he can trust with it, which Dr. Neuman meets Milo who growls at him and tells Stanley that he is afraid of dogs, so Stanley keeps him back while Dr. Neuman agrees to take the mask so as long as he takes his dog and goes away. Stanley is happy to be rid of the mask, but Milo shows him with frisbee what if Dr. Neuman put it on, which Stanley laughs it off and tells Milo he'll never put it on. But Milo is right as Dr. Neuman saw the mask glowing so out of curiosity and temptation, he puts it close to him which it then wraps itself around his head, and does the whirlwind which lighting comes out of it, and Masked Dr. Neuman comes out which he has glasses along with having a hair which is straight up, yellow clothes, a red and black bow tie, blue trousers and sneakers. Stanley does think what if he did put it on, and he gets his answer as Masked Dr. Neuman crashes out of the fence riding on a child bicycle and then he sees Stanley which he pops his eyes out which are attached by springs, which he puts him on a therapy couch and he puts himself on a chair, asking Stanley why does he insist on annoying him, which he then pops his eyes with springs attached out again and Stanley in shock and horror asks him if he's wearing the mask, which Masked Dr. Neuman tells him that his fantasies about the mask aren't just hallucinations, but they are also feelings of persecution, transference and denial, but however he changes his voice from deep to high-pitched and popped his eyes with springs attached out a third time, which shows Masked Dr. Neuman to be the one in denial as he is delusional, psychotic and genuinely insane. Masked Dr. Neuman tells him in short that he is suffering from a disorder he calls Ipkissa Maskosis, so for his own safety he must be straitjacketed which he uses Stanley's pants to make one while saying wedgie with a goofy smile on his face, then tells him he must get him to a safe haven at once which he puts him in a birdcage. Masked Dr. Neuman tells him that he thinks there must be others like him, so he must cure the world before it's too late while he is checking his watch to see that his appointment time is not there yet and he bounces his head to get going. Milo comes out of hiding and Stanley tells him that he is right, so Milo gets a box to climb on, frees Stanley, but ends up getting stuck with him. But Stanley decides there is no time for that as they must find Masked Dr. Neuman. Masked Dr. Neuman uses wedgie straitjackets on a boy all because of a costume he is in, which the boy's mom hits him on the head several times so Masked Dr. Neuman thinks she has the disorder as well, but due to being a gentleman puts her in a cage instead of doing another wedgie straitjacket on her, then he flies on a book while thinking on ways of how to get rid of the disorder, which he ends up in a zoo and sees a gorilla eating a banana, so he thinks that the animal has the disorder as well, so after the gorilla roars at him, Masked Dr. Neuman goes inside the cage, wrestles the animal and takes diapers out to make a wedgie straitjacket on him, then he bounces his head again and meets Charlie Schumaker at the entrance of the Edge City Bank and he puts him to rorschach tests, telling Charlie to look at them and tell him what he sees, which he replies babe to all of them, and it made Masked Dr. Neuman very happy for a moment, but then Charlie sees his green-head and says The Mask, which causes him to be disappointed with him for that and also think he has got the disorder as well. Charlie hears the name of it and asks him if it's related to his friend which Masked Dr. Neuman asks him does he know him which he said yes since he is a pal of his. It got Masked Dr. Neuman angry for the first time as he stretches his neck up high, blows steam out of his ears and tells Charlie he did not report him to the proper authority in a high-pitched voice, so he gets out a medical tool saying this calls for medical corrective treatment, and Charlie asks him what does he have in mind, which he tells him he going to remove his brain and Charlie screams at what is about to happen. But the alarm on Masked Dr. Neuman's watch goes off so he decides do it in another session, which he puts Charlie in another wedgie straitjacket, then in a cage and uses a bouncy stick to get to the jailhouse while smiling like a real lunatic. Stanley meets Charlie who told him what happened and Stanley covers it up by saying The Mask has got rabies from Milo, which he asks Charlie where Masked Dr. Neuman gone to and he tells he went to the jailhouse, so he tells Charlie to release him from his wedgie straitjacket so he can get there to stop him. Masked Dr. Neuman comes inside the jailhouse and tells the female police officer that he is here to examine a prisoner, which she is taken aback by his green head and deep voice, so she asks him if he is Dr. Neuman and he tells her yes. Which she tells him, she is going to double check on his clearance, but he stops her from picking up the phone, grabs her by the tie and warns her not to mess with him as he is a licensed psychotherapist, so she tells him where his appointment is and he lets her go. Masked Dr. Neuman meets Pretoirus and gets told by him that he is wearing the mask which causes him to think that he has the disorder as well, but Pretorius tells him it is utter nonsense and explains to him why he is in the cell, as he discovers an alien planet which their ancestors come from and that the only way to get proof is the destruction of Edge City. Masked Dr. Neuman writes it all down on notepad and admits that they were right about Pretorius as he is completely insane, but he thinks they are not so different from each other which he tells him that along that the world belongs to them, and that his plan might be the only way to get rid of the disorder, so he pushes his head through the jailbars and tells the police officer nearby that he demands to have Pretorius in his custody immediately. After going through everything to have him released and getting him into custody, Masked Dr. Neuman tells Pretorius that he wants to know more about his plan, but he refuses so Masked Dr. Neuman reminds him that he is under care, which Pretorius tricks him and gets out a mallet out to hit him with, and leaves him behind. Masked Dr. Neuman goes after him wanting to learn more, while Stanley and Milo see him and they both go after him. Pretorius goes to a junkyard, uses a remote to bring out a missile, climbs up on the steps, puts the plutonium inside top of the missile, then gets greeted by Masked Dr. Neuman who still wants to learn more about his plan, so Pretorius decides to tell him all about it as long as he goes away, which Masked Dr. Neuman agrees to do that and walks alongside him, while Stanley and Milo saw him working together with Pretorius. Pretorius explains that the missile will destroy Edge City, then causes a flash explosion with a giant camera that will take a picture of the aliens from another planet, which Masked Dr. Neuman gets overjoyed and excited at the fact that it will get rid of Ipkissa Maskosis once and for all. Stanley sees just how insane Masked Dr. Neuman is and decides to go to the missile to stop it from lunching, but both Pretorius and Masked Dr. Neuman both see him, which causes Masked Dr. Neuman to growl at the sight of him and gets Pretorius to take care of him, and Masked Dr. Neuman agrees to do that saying it is his professional duty. Pretorius goes inside the camera to get the missile started and Masked Dr. Neuman goes after Stanley, trying to kill him with a mallet, a chainsaw and trying to get him to fall to his death with a large stick, but Stanley manages to hold on to the edge of the building they are on. Masked Dr. Neuman decides to put an end to him by using an electric wire to kill him with, taking sadistic pleasure in what he's about to do, but Stanley uses quick thinking twice such as trying to trick him by saying he has the disorder which it does not work since Masked Dr. Neuman is a trained psychotherapist insane or not, so Stanley manages to trick him by saying his fly is open which Masked Dr. Neuman looks at it, then Milo bites him on his bottoms, which Masked Dr. Neuman tries to kill him, but ends up electric himself instead and ends up exploding into fireworks, then ends up on the ground which his face comes off Dr. Neuman. Milo throws the mask to Stanley and Pretorius launches the missile at the same time as Stanley puts on the mask and The Mask comes out just as it lunches into the air. The Mask holds on to the missile and tries to cut all the wires inside the missile, but it does not work, so he decides to turn it into a sandwich, rockets down to the ground, opens his mouth wide and breaking the fourth wall, tells the audience that they are right as he is going to eat it. The Mask swallows the missile which it then explodes inside him, though he admits that he should have left out the green peppers. Pretorius gets pictures, but of The Mask instead which the last one shows him pulling his tongue out that causes Pretorius to scream out in rage at being foiled again by him. The Mask though he has the chance to show himself to Dr. Neuman decides it's not worth going over to him since he knows just how dangerous Dr. Neuman really is when he has the mask on, so he takes his face off. Stanley calls out to Dr. Neuman asking him does he believe that The Mask is real, but see him get distracted by his fear of dogs as Milo growls at him, so Stanley also decide that it's not worth proving to him that The Mask and decides to play frisbee with Milo instead in the end.