Hannah Kline is a successful Los Angeles obstetrician and the recently widowed mother of a young daughter. She is barely managing to hold it all together, when her life is shattered once again by the brutal murder of her beautiful, bright, zany and recently divorced sister-in-law Beth. Detective Daniel Ross of the LAPD thinks the killer had a very personal motive. Hannah is determined to do whatever she can to assist the police in finding the murderer. She finds herself obsessed with the details of Beth's life, and as she encounters her sister-in-law's eclectic collection of friends and former lovers, she discovers that all was not as it seemed. Not only was Beth a woman with a secret life, but her secrets may have led her inexorably to a rendezvous with her killer.