The Catatonian shape-shifter, Catalina Catacall, infiltrates Freedom Fighter Headquarters on Mars and captures Carbine. Catalina's objective? To download Biker Mice computer files and get her claws on Carbine's new secret weapon: the Surgerator, a device boosting the Regenerator's power ten thousandfold. However, Carbine is not so easily fooled or defeated and it becomes a showdown between these two enemies with the future of Mars at stake!