A disaffected teenager skips school to mourn his dead dog and tries to puzzle out the missing variable in his life.

A couple moves into an old, country farmhouse and is touched by a sentimental grave. One day, a man arrives after being released from a mental hospital, tells the couple it's the grave of his beloved pet, and asks to dig it up; however, police detective intervenes and arrests the man. It turns out the man is a serial killer and the grave holds a suitcase full of trophies from his former victims.