When the apocalypse arrives, Nina, who has no superpower, is taken in by her ex-boyfriend Liam Lowe, a wielder of triple superpowers. She grows from a burden to a warrior. Nina discovers she possesses an SSS-grade spirit-controlling superpower. Liam Lowe, fearing for her, wants to take her to live in seclusion. After Nina's superpower talent is exposed, Liam Lowe takes her on a secret mission to Flower City. Their teammates, noticing the pair are missing, investigate.