Shinichi has been hunted, and now he is to become the hunter. The humans and parasites are gearing up for a terrible, bloody showdown, and Shinichi has been recruited to help in the fight. There's no choice but to cooperate and do his best to keep the secret of his parasitic arm close to his chest. But as the fighting escalates, a powerful enemy resurfaces...and Shinichi may soon be the one in the crosshairs.