A killer on the court

Jessica is delighted when her nephew Grady invites her to spend a few days with his family in an oceanside New York bungalow. She packs her bags and heads down to the city, ready to spend some quality time with Grady, his wife, Donna, and their young son, Frank. But the morning after Jessica's arrival, Donna finds her boss dead on a tennis court, and Jessica's dreams of a relaxing visit are quashed.