Fourth Gear gives Luffy the power he needs to head off Doflamingo at every strike! But the energy required to keep Fourth Gear going starts to take a toll on Luffy. Will he have enough left to finish the job?

With Luffy and so many of the Straw Hats` allies incapacitated, victory seems inevitable for Doflamingo - but the compassion of Mansherry may be enough to turn the tide and renew their hope - to stop the Birdcage!