DI Jack Mooney and the team are left puzzled when Diane Smith, fiancée of hotel billionaire Philip Marston, is found dead the day before her lavish wedding.All evidence points towards suicide, but Jack is convinced there's more to this case than meets the eye and turns his attentions to her family to be. With the victim's room locked from the inside and all suspects in different locations around the hotel, how could any of them have committed murder?