Since Darren Devlin and Marek Masters joined forces, their goal has been to take down Xsp, the secret organization that turned them into genetically-modified superhumans. Even with 21% Monster Darren's incredible strength, and 19% Alien Marek's superintelligence, Xsp remains a formidable challenge.

But what if there was another survivor of Xsp's experiments? A tall, tough, athletic teen girl able to withstand sub-zero temperatures and track potential predators. A girl who's 17% sabre-tooth polar bear, and out for revenge.