Beach Head Roadblock and the Baroness find themselves in 1930s Chicago in the middle of a mob war. Can they maintain their fragile alliance long enough to locate the displaced Transformers? While on Cybertron where a Transformer civil war rages Shockwave is mere hours away from accessing the portal that will allow him and his legions to invade earth. If the Joes and Cobras do not succeed before Shockwave does there will not be a nation ù or a planet ù to battle over...