Portgas.D.Ace, 2nd Division Commander of the Whitebeard Pirates, has been captured by the Marines! They are planning his public execution on the island of Marineford.

Whitebeard has united an enormous fleet of Pirates to attack the island and free his adopted son, Ace.

Choose your side - The Great War is about to begin!

Whitebeard and his allies must find the key to Ace's handcuffs, free him, and help him escape. The Marines must eliminate Whitebeard and Ace.

Which side will be victorious at the end of the day?