An English mystery novelist invites a medium to his home, so she may conduct a séance for a small gathering. The writer hopes to gather enough material for the book he's working on, as well as to expose the medium as a charlatan. However, proceedings take an unexpected turn, resulting in a chain of supernatural events being set into motion that wreak havoc on the man's present marriage.
In 1919, Frank Gibbons returns home from army duty and moves into a middle-class row house in the suburbs, bringing with him wife Ethel, carping mother-in-law Mrs. Flint, sister-in-law Sylvia and three children. Years pass, with the daily routine of family infighting and reconciliation occasionally broken by a strike or a festival, and even another World War.
Jilted by his fiancee, Arthur Pilbeam gets a job as far away from women as possible. Alone in a lighthouse, he soon finds that 12 other people end up living on the tiny island. Thirteen is an unlucky number; and one-by-one they disappear ...
