Set in 2097, in Neo Hong Kong where a virus made by genetic engineering. In order to stop it, S.T.A.N.D is a police force coming to defeat the infected machines and humans. Serge (main character) intends to kill the leader of S.T.A.N.D, Captain Raven. But Raven has been expecting Serge and his number of goals. But Serge gets infected by the weapon that he uses because it got infected by the virus. He joins the S.T.A.N.D ranks to fight infected monsters and other killers.