After causing him nothing but trouble, Stanley Ipkiss gets rid of his mask by burying it in quick-drying cement, but must retrieve it to save Peggy and Milo from Pretorius.

Pretorius tricks Stanley's friend and co-worker, Charlie, into building a "house of tomorrow". The Mask must stop him and save Peggy, Charlie and Milo.

Baby-sitting turns difficult when the infant acquires the Mask and joins a biker gang, whose leader is posing as children's entertainer Barnaby the Dinosaur.

Lt. Kellaway handcuffs himself to Stanley to prove that he is The Mask, and Stanley must go to elaborate lengths to get away when mutants Putty Thing and Fish Guy go on a rampage.

Pretorius creates a "sister mask" that turns The Mask into a living puppet, in order to use him to steal meteorite fragments with unusual properties.

The vitality-stealing Skillit comes to Edge City to steal the shadows of Charlie, Peggy, and Milo, and only The Mask can stop him.

Stanley dates a shy, quiet co-worker named Evelyn, who becomes a loud, man-hungry woman when she stumbles upon the mask. Meanwhile, Pretorious looks for a female companion.

A reverse therapy treatment helps Stanley deprive the mask of its power by acting uninhibited in his normal life, but must get the mask working again when the villain Kablamus threatens the city.

Stanley gives the mask to Dr. Neuman, who puts it on and teams up with Pretorius, who wants to nuke the city in order to take a flash photograph of an alien race's planet.

Frustrated by the city's mismanagement, Stanley puts on the mask hoping to teach Mayor Tilton a lesson. Instead, The Mask announces his candidacy for Mayor of Edge City. Initially objecting, Stanley has to make sure his alter ego wins when he discovers that Pretorius has taken Tilton's place for a diabolical plan.

Mistakenly believing The Mask is an alien seeking to take over the planet, FBI agents try to capture him. Meanwhile, Putty Thing and Fish Guy go on a road trip.

Milo puts on The Mask to battle an insane dogcatcher named Willamina Bubask who is capturing dogs for a (somewhat) sinister purpose. Meanwhile, Walter stalks Stanley at Cheap Chucky's Chili Cook-Off.

On Halloween night, Skillit escapes from reform school to get revenge on The Mask, and reanimates the corpses of three of Stanley's predecessors: Atilla the Hun, Billie the Kid and an evil wizard called Nilrem.

The villains in Edge City (namely Kablamus, Walter, the Terrible Two, Don Julovit, and Dynamite Joe) disguise themselves as Santa Claus to commit crimes. The Mask must save Christmas by proving Santa's innocence even after a brief detour thwarting Pretorius's plans to capture Santa.

The mask breaks in half during Walter's attempt to steal it, resulting in both Stanley and The Mask existing at the same time. When former bully Chet gets the other half, the two personalities must work together to piece the mask together.