Devastating radioactive fallout rained down on the Earth, leaving not one area untouched except the depths of her oceans. The citizens of Ocean One, along with their sister colonies Ocean Two and Ocean Three, now have the technology to rid Mother Earth of the radioactivity that plagues lands and keeps humans from thriving on the surface as their ancestors once did. Now it is up to Commander Knight and the crew of the most sophisticated submarine ever imagined using this technology and healing the Earth. However the Trident brings her crew into unknown waters and lands with both known enemies of Ocean One and new ones to defeat so these Purifiers can rid the Earth of her sickness. Until she is healed the Earth itself can be a deadly enemy Commander Knight must face. Radioactive weather and creatures never imagined will assist an unknown enemy determined to make the Earth more radioactive so complete control, including the control of all oceans, can be achieved with little effort. Commander Knight must prevail.