Margot and Tony live a seemingly charmed married life in 1950’s London. But not all is as it appears: Margot, desperate to return to her idyllic domesticity, has ended a lengthy affair with a dashing American lover even as she’s being blackmailed by someone threatening to expose her indiscretion to her husband. But Tony already knows, and has a plot of twisted revenge on his mind.

Adapted from Frederick Knott's original, made famous by Aflred Hitchcock’s film, Jeffrey Hatcher’s taut adaptation keeps the twists coming until the very end.