Chris Channing's former fiance Jeff tells her that his life is in danger: his wife is slowly poisoning him. But is this true? Responding to his claim, Chris goes to him at Morgan House where she's up against the strange brother-in-law David, the cunning wife Mary, and Jeff, the man she'd once loved, but who's now vastly changed. Chris, lost, confused and swept into a powerful undertow of danger, begins to realize that someone is trying to kill her ...