Tim Avery, an aspiring cartoonist, finds himself in a predicament when his dog stumbles upon the mask of Loki. Then after conceiving an infant son "born of the mask", he discovers just how looney child raising can be.

Stanley, a meek bank employee, turns into an eccentric and maniacal green-skinned superhero who can bend reality, after wearing a wooden mask that was created by Loki, the Norse god of mischief.