Conner Kent (a.k.a. Superboy) is stranded on the savage world of Skartaris, home to the legendary hero called the Warlord, and his Young Justice compatriots are out to find him and bring him home. But with this crew of young heroes nothing is ever simple. The evil scientists of S.T.A.R. Labs are responsible for Conner's disappearance (again), and now it's time for a reckoning -- the Multiverse just isn't big enough for both groups. Taking out such concentrated evil will require some extra firepower, though, and Impulse is on the case with a super-speedy recruitment drive for teenage heroes -- including Aqualad, Spoiler, Sideways, and Arrowette! But this battle will bring unexpected consequences, as Superboy's and Impulse's true origins are exposed for the very first time. Can the ever-expanding for Young Justice weather the storm, defeat their enemies, and survive long enough to start a League of their own?