After a freak accident, Jasper finds himself transformed into a cat. He is rescued by Mercy, an act of kindness that awakens his powers as a Tamer.
Guided by the System, Jasper grows in strength through constant interaction with virous beasts. He is soon thrust into the violent turf wars of Decadence Street, uncovering a web of conspiracies involving the powerful Cloud Group and other factions.
Meanwhile, Mercy discovers her own unparalleled talent, setting her on a path toward martial arts mastery. As their destinies intertwine, the true struggle is only just beginning...