Identical twin brothers who own a detective agency hatch a plan to expose a phony group of psychics, but soon find themselves involved in a murder.

After learning of his sister's suicide, Nick, a small-time boxer, decides to pay a visit to his sister's junkie lover in Los Angeles, collect some money and pursue an early retirement in Mexico. Along the way, he meets a 9-year-old girl who's been abandoned by her father and together they hitchhike south.

A man and his wife stumble upon a town whose inhabitants turn into zombies and head for the edge of town every night... he seems to be the only one unaffected. What is happening to the townsfolk? Who is the mysterious young woman he keeps seeing? Why isn't he affected?