A pair of happy-go-lucky siblings, left alone while their parents recover from an illness, play a series of pranks on each other. The game becomes nightmarish when they realize something sinister is watching them - and it wants to play too.

Minnie Goetze is a 15-year-old aspiring comic-book artist, coming of age in the haze of the 1970s in San Francisco. Insatiably curious about the world around her, Minnie is a pretty typical teenage girl. Oh, except that she’s sleeping with her mother’s boyfriend.

A feuding brother and sister entangle the fate of an old friend.