The docudrama «The Perseus Survivor» reveals the story of the World War II Submarine HMS «Perseus» and the presumably undercover agent John Capes - the only man, who survived the explosion causing the loss of said vessel. Intense investigation of her unnoticed loss by the research team, led by the famous underwater researcher Richie Kohler, uncovered the whole sequence of interconnected events that brought to light the numerous mysteries buried in the dark waters of Mediterranean.