As they set sail, the crew discovers that the Marines have confiscated all their cannonballs. Under heavy fire from Marine warships and base cannons, Luffy uses his (Balloon) ability to catch incoming cannonballs and redirect them at the base's Sea Gate to blast it open. The Missing Treasure

The Straw Hats’ situation improves as key members rejoin the group:

The crew finds themselves cornered at Dock 88 by a massive force of Marines. To buy time and clear a path to the , Nami and Dr. Kobato orchestrate a clever plan: they pretend Dr. Kobato is a hostage. This trick forces the Marines to lower their guard, allowing the crew to fight their way back onto their ship. The Reunion and Discovery

makes a dramatic return after finishing her research in the base's library. She subdues several Marines and brings a crucial map of the Navarone Island base.

Just as they appear to have made their breakthrough, Nami realizes a devastating loss: the Marines didn't just take their ammunition; they also seized the massive hoard of the crew brought back from Skypiea .

, Dr. Kobato’s father and a skilled shipwright, assists the crew by releasing the anchor of the Going Merry, enabling their departure.

and Sanji showcase their combat prowess, while Chopper contributes to the group's deceptive tactics. A Defenseless Escape