When a rash of ecoterrorism strikes the Seattle waterfront, Owen Ruger and his trusted friend Rafael Sernansa are hired to investigate the crimes and protect the assets of a large fishing company. But during the rescue of a beautiful woman they see what can only be described as a merman swimming away from the scene; soon they find themselves in the middle of a strange and unusual mystery. Driven by what they saw, Owen and Sernansa race to solve the mystery and stop the destruction before fear grips the city, but they soon learn that everything isn't what it seems and the mystery swimmer may be just another victim.