The Isle of Man now rests on the bottom of the Irish Sea, cut off from the surface world and surrounded by the dark waters of the unknown. While Mannix, their young savior, provides the inhabitants shelter and life through his unique blue energy, Imogen "Genny" Creer uses her unparalleled intelligence to guide the Keepers, the protectors of the island, and prevent their society from falling into disarray. Despite being married to the man she loves, managing the Keepers' science division, and being seven months pregnant, Genny is far from content. She is deeply disturbed by the secrets still...