The world of Injection takes place centuries after a cataclysmic event has brought the human race to the brink of extinction. A corporation named Syntech forms to restore order and salvage technology from the past to fuel future innovations. Their success hinges on the use of D.E.I.T.Y.s, agents chosen through an undisclosed process. Each D.E.I.T.Y. has a unique weapon and is aided by injection: specialized serums created by Syntech that enable agents to augment their abilities with various powers. Our story follows one agent, Jinn, who is sent to one of the last remaining cities to hunt for a defector of the organization.