A 13-year-old boy named Billy runs from home as his parents forget his birthday. Making his way through thick woods, encounters a drifter who is violently slashed to death after Billy leaves. Billy stumbles on an old mansion where a room is decorated for birthday celebrations. Thinking it is a surprise by his parents, he opens a present to discover severed head. Running away, he is attacked by the drifter's killer, a cat-like human with a hook on one hand, and subsequently buried alive.