Bank clerk Stanley Ipkiss is transformed into a manic superhero when he wears a mysterious mask.

After a meteor collides into Earth, a lonely rancher and a lost young girl are on the run from vicious mercenaries.

When timid bank clerk Stanley Ipkiss discovers a magical mask containing the spirit of the Norse god Loki, his entire life changes. While wearing the mask, Ipkiss becomes a supernatural playboy exuding charm and confidence which allows him to catch the eye of local nightclub singer Tina Carlyle. Unfortunately, under the mask's influence, Ipkiss also robs a bank, which angers junior crime lord Dorian Tyrell, whose goons get blamed for the heist.

The early career of legendary lawman Wild Bill Hickock is telescoped and culminates in his relocation in Deadwood and a reunion with Calamity Jane.

Bank clerk Stanley Ipkiss is transformed into a manic superhero when he wears a mysterious mask.