Give Me a Ring Sometime

A party is taking place on a yacht. A waiter slips away to burgle a cabin and hand the item through the cabin port to an accomplice in a waiting boat. The action moves to a hotel club and a stranger (Juan) deliberately trips up a dancer (Carol) to get her attention and buy her a drink. Whilst talking he sees someone who alarms him and hands her his key asking her to get a brown envelope from his room and meet him later. Carol gets the envelope but is nearly caught in the room by a mysterious stranger with a tattooed hand. Later when Juan fails to arrive Carol and her friend Adam open the envelope to find a map of an island and decide to investigate. They get hold of a boat and whilst traveling to the island Carol finds the dead body of Juan hidden in a cupboard and realises the boat owner is the mysterious stranger. She and Adam escape onto the deserted island but the stranger chases them. They hide in a hut and find the stolen item. A fight breaks out between Adam and the stranger and then Carol and Adam escape from the island on the boat.