In a future plagued by a deadly virus that transforms wildlife into lethal monsters, humanity faces extinction as they struggle to survive. Alice and her sister Mona reside in an isolated island city, devoid of hope or rescue from the distant White Jokers, a government's elite battle scientist group. Fiercely protective of her sibling, Alice realizes their odds are slim against imminent threats, armed only with her handguns. Suddenly, a enigmatic boy donning a white lab coat, accompanied by a mysterious timer above his head, appears. Could he be a savior from the White Jokers, capable of safeguarding their imperiled city?