The episode starts with two men throwing a body into the ocean. The next morning, Mitch goes out on a dive search with the two rookies, April and Skylar. A fishing boat had reported that they had seen two men dumping something into the water last night. It doesn't take long for Mitch, April and Skylar to locate the corpse. April drops her can of air while trying to scream, and Mitch helps her up to the surface. Later, April tells Skylar that when she saw the dead man, she remembered when she was a little child and she saw a dead man under the ice while she was ice-skating. April and Skylar are surprised to find out from the coroner's office that the man was probably already dead when he was dropped into the ocean. Later April has a nightmare about the incident and is convinced that he is calling out to her. In the dream, she sees his silver necklace in the water. She recalls that she saw it during the rescue as well. Therefore, she and Skylar dives down with a metal detector and manage (thetvdb.com)