In a desperate attempt to help his friend, Reed Richards, the leader of the science adventurers known as the Fantastic Four, has accidentally punched a hole into an adjacent universe. Now something has come through the gateway from a realm known as the Supremeverse: the team of astonishingly powerful superhumans called the Squadron Supreme! Their mission: to arrest young Reed for high crimes against their world! What happens when the Squadron collides with the heroes - and villains - of the Ultimate Universe? All-out action, drama, and spectacular eye-candy! Collects Ultimate Power #1-9.