Katie Bonner's ideal day off sailing Lake Ontario with her friend, attorney Seth Lander, takes a sharp turn when she crosses paths with her argumentative former boss, Jake. Relieved to leave his dockside drama behind, Katie thinks the headache is over.

Instead, the nightmare begins the next morning when Jake is discovered dead in a bathtub at a local Victoria Square bed and breakfast. The local authorities initially suspect a tragic accident, but the autopsy reveals a chilling twist: Jake's lungs are filled with lake water, not bathwater. Suddenly caught in the wake of a murder investigation, Katie must navigate a sea of secrets to catch the real killer before her business and her life are permanently capsized.