Stolen from their mothers, Kenzie and X, by K before their memories were fully developed, Chase and Kayla are deadly twin siblings that have never known what it's like to have a normal life. Heartbroken, Kenzie and X have searched for their son and daughter for the past fifteen years, but without success, thanks to K and his expert abilities at hiding. With both Kayla and Chase being half Disassembly Drone, K has to bring them back two live 'targets' to feed on so they don't overheat and die, although Chase and Kayla don't know this, so they think that it's just a fun game they play sometimes, whenever K can find and catch two random Workers unaware. Will Kenzie and X ever find them before it's too late to reverse the mental damage K's done to them, they don't know...