 Edgar and Sylvia Chalmer s neighbor, Cyril, tells Edgar he s going to sell his house to a big "family" and move to the Caribbean, but the "family" will only buy his house if the Chalmers sell theirs too. Edgar likes the idea, because he can hardly afford the upkeep. But, after he tells Sylvia, she doesn t. Soon after they learn about each other s diverse views, they start trying to kill each other. Edgar tries to kill Sylvia so he can move to the Caribbean and Sylvia tries to kill Edgar so she can use his life insurance money to buy Cyril s house.