Raj and his Wife leave for Switzerland to work. They befriend their neighbours Vicky and Sonia another married couple. When Vicky suggests wife swapping Raj is apposed to the idea and the two fall out. However, one drunken evening vicky again suggests the idea to Raj and he agrees. Raj goes into Sonias' bedroom and the next thing Vicky learns is that Sonia is dead...did Raj kill Sonia?