A new thriller from #1 New York Times bestselling author and "Queen of Suspense" Mary Higgins Clark.After a party when her parents are away, eighteen-year-old Kerry Dowling is found fully dressed at the bottom of the family pool.The immediate suspect is her boyfriend who had a bitter argument with her at the party. Then there is a twenty-year-old neighbor who was angry because she didn't invite him to the party.Or is there someone else who has not yet been seen on the radar?Kerry's older sister Aline, a twenty-eight-year-old guidance counselor, is determined to assist the Prosecutor's Office in learning the truth. She does not realize that now she is putting her own life in danger...