Cold war kickoff! After receiving a distress signal from Aquaman, the Justice League travels to Antarctica, where they discover an ancient prison at the bottom of the legendary pit of Tartarus. But who picked the locks within? Freed from their shackles, creatures of myth and horror emerge to battle the team, while the League must confront their own personal demons. What exactly lies at the base of this well, and what will be left of the Justice League when they discover its secret?