In an antiques shop, a weak, neurotic man named Stanley Ipkiss shops for a gift to give to his girlfriend, Kathy. At the store he purchases an old jade mask which begins to speak to him. When Stanley wears it, he is transformed into a wacky super-powered being with an abnormally large, bald, green-skinned head and a mouthful of large teeth. After exploring his new abilities, Ipkiss goes on a rampage, taking revenge on those with whom he has a grudge, and earns the nickname Big Head.
