Whitney Cameron is in a quandary: he's attracted to his beautiful sister-in-law, Lynn, but also harbors serious suspicions about her. Her husband, Cameron's brother, died under mysterious circumstances, and now that the death of her stepchild, Polly, has been attributed to poisoning, he suspects that Lynn is after his late brother's estate, and killing everyone in her way.
An ailing barrister is thrust back into the courtroom in what becomes one of the most unusual and eventful murder cases of the lawyer's career when he finds himself defending a man being tried for the murder of a socialite.