"Below Deck's" beloved Capt. Lee Rosbach is an expert on demanding mega-yacht passengers and a rowdy, mischievous crew. But now he's steering his ship toward a completely different group of people -- criminals, who have committed some of the most chilling murders to have ever taken place on the water. From dream vacations gone wrong, to alleged pirates of the Caribbean and everything in between, these true crime stories are unlike any that take place on land. Using his nautical expertise, Capt. Lee will unravel the secrets of remarkable homicide investigations on rivers, lakes and even the open seas, and will expose the murky, maritime clues that sunk the perps and ultimately led to their capture. Interviews with victims' families, boating experts and law enforcement uncover new evidence and disturbing revelations, taking viewers on a dangerous and unforgettable voyage.