Living a secluded life in Belgium, Sei has no thoughts of returning to her former life as an assassin until a mysterious person confronts her with a contract she can’t possibly turn down. Payment isn’t monetary; instead, it’s information leading to the whereabouts of a little girl. Hers. In a matter of seconds, Sei is pulled back into a world she left behind. She accepts the contract to chase the truth about her daughter, but what appears to be a routine mission turns into a fight for survival. If Sei is to have any hope of reuniting with her child, she must first save herself.