Landley, an intelligent lower caste member of a society dwelling under the ocean floor, is accidentally associated with a secret group whose mission is to ensure tetraped survival. The powerful empire refuses to deal with the tangible hazard to its citizens. The paranoid leader views criticism as treason. When hints of the group’s existence surface, members’ lives are threatened. Landley’s heartthrob detective, Lawson, becomes involved in a plan to protect them.