DOG EAT DOG!

Three robbers, Lylle Corbett, Dolph Kostis, and Darlene, steal one million dollars from a shipment on its way to the United States. But instead of sharing the loot with Lylle, Dolph decides to kill him without Darlene's (who likes them both) knowledge. When returning to Darlene (his wife) at the Hotel Americano's, Dolph informs her that Lylle is out of the picture and that she should forget about him. Before Dolph's return, Darelene was visited by hotel manager Livio Morelli, requesting her to turn down the volume on her radio. Spotting a one-thousand-dollar bill under the edge of the bed, Livio quickly concluded that they are the robbers he heard about on the radio.

Dolph and Darlene make a get-away on a rental boat. They are unaware that the hotel manager's innocent looking sister, Sandra, is in the back of the boat and has planted a bomb to kill the pair. She wants the money for herself and her brother. Lylle, who turns out to be very much alive, is also on board.

Lylle takes everybody hostage before they arrive on a supposedly "deserted" island. However, the island is not entirely deserted; Lady Xenia has retired here to spend her final days in peace, accompanied by her butler Jannis. Also arriving on the island is hotel manager Livio, who has left his "girlfriend", Madame Benoit, at the hotel to take care of the police detective, who has been asking questions about the robbers. Dolph, Lylle and Darlene are unaware that everyone on the island knows that they are the robbers and that they all want the money.

After a while an unknown killer starts eliminating people on the island. Lylle suspects the killer to be the holder of the one million dollars or a person looking for it. After Dolph dies, followed by Livio and Jannis, Lylle goes insane searching for the million. Lylle eventually finds out that innocent looking Sandra is the killer and is in possession of the money. Fighting over the money, Lylle and Sandra fall off a cliff and die. Darlene, now the last woman standing, drowns herself as the police are arriving on the island.

Lylle and Sandra die fighting over the stolen money by falling off a cliff, and Darlene drowns herself as the police arrive.

The climax sees the last survivors consumed by their greed and paranoia, resulting in mutual destruction. Darlene's final act underscores the corrosive effect of betrayal and avarice, leaving no one to claim the loot and emphasizing the film's bleak outlook on human nature.