When an international terrorist (Kinski) hatches a plot to kidnap a wealthy couple`s child along with the family`s maid (George) and chauffeur (Reed), it seems like the perfect crime. Unfortunately, it goes terribly wrong when, during the kidnapping, the boy`s pet Black Mamba snake is let loose. Vicious and deadly, the snake soon has everyone in the house captive and begins killing them off one by one.