Steve Morgan (Tierney) is a charming Psychopathy who has just robbed and killed a cinema cashier. Seeking to escape, he hitches a ride to Los Angeles with unsuspecting Jimmy 'Fergie' Ferguson (North). Part way the pair stops at a gas station and picks up two women. Encountering a roadblock, Morgan persuades the party to spend the night at an unoccupied beach house. The police close in as one by one Morgan begins killing the threesome.