After escaping from the underwater prison Impel Down, Monkey D. Luffy sets out to rescue his brother Ace from being executed by the World Government. Arriving at Marineford with only three hours to spare, Luffy finds himself shut out by the large gates surrounding the base. As the destructive pirate Whitebeard and his crew declare war on the marines, the soldiers prepare to defend their prisoner and carry out his sentence no matter what. With the stakes growing higher by the minute, Luffy will have to get creative if he intends to stand a chance against these titanic forces.