Two years of failed leads have passed since SeaSatellite5 was taken by the Lemurians. When a botched mission to A.D. 3001 irrevocably changes their relationship, Chelsea leaves Trevor and TAO behind to determine if TruGates, a paramilitary group, knows more about the Atlantean-Lemurian war than they're letting on. If Chelsea and Trevor can't get past the betrayals and heal their wounded hearts, not only will the fate of the station dangle on a precipice, but also every member of the crew they once risked everything to save.