Spasmo

Christian Bauman (Robert Hoffmann) only wants a quiet walk on the beach with his girlfriend, until they find a woman washed up on the sand. The next day he sees her again at a yacht party, and one meeting leads to another until Barbara (Suzy Kendall) is mixed up in it too. Umberto Lenzi pulls them into an affair of lust and murder, where Christian can no longer tell who is lying to him, or what his own life is worth.