New York, Manhattan — in the future... the Dead Girls — Kate, Claire, Rose, and Rachel — continue to wander the decaying world, working as bounty hunters. Although they spend their nights fighting, the girls also lead an ordinary school life by day. After a successful hunt the night before, a male and a female transfer student show up on the school grounds the next day. Both the fragile Lise Harriette Meyer and her handsome older brother Edgar approach Kate and her friends. Though what are their motives? Roosevelt Island, also known as the Red Garden, a cursed place for some, where monsters are supposed to roam, is also the Dead Girls' "birth place", a sanctuary. Here they will have to face their past, and their present deadly enemy.