Chapter 503 is titled "An Island in Chaos".
Monkey D. Luffy starts an uproar in the Human Auctioning House by punching Saint Charloss. All the Straw Hat Pirates gather at the auction house. Silvers Rayleigh escapes with a giant and meets Luffy, stating that he had want to meet Luffy.
The Auction House is in shock by the punch, Luffy has knocked out a Celestial Dragon, Saint Charloss and smashes him against several empty benches. Everyone, including Keimi, Pappug and Hatchan become shocked while Luffy act it like it was nothing, with only Kid and Law smiling from his outrageous actions. Luffy immediately apologizes, knowing that an admiral from the Marines would come due to his attack on the World Nobles, but Zoro admits that he was going to attack the World Noble too while the rest of the crew has moved on to freeing Keimi from her bowl prison.
Unfortunately, the remaining Celestial Dragons, Saint Roswald and Saint Shalulia are horrified by Luffy's action. Roswald draws a gun but Sanji kicks it out of his hand before taking out a guard nearing him. More guards appear for their protection of the mermaid, but Zoro and Franky easily take care of them. Luffy continues his defiance of the World Nobles, and Roswald is threatening that he will send for an admiral. The remainder of the auction house soon clears out as Zoro slices opens Keimi's bowl, grateful for the rescue.
In amidst the growing chaos, the Rosy Life Riders arrive with more crew members while Disco attempts to protect the slave he intends to sell. Roswald continues to threaten action against the pirates until Usopp accidentally lands on his head, knocking him down. Robin and Brook assist in fighting the guards. Luffy comments that the Marines are "coming", but Law corrects him by saying they are "already here" surrounding the auction house though Luffy is more interested now in the bear in his crew.
Angry with the way things were going, Shalulia seizes Keimi from Disco, threatening to kill her. But before anyone can do anything to stop her, she suddenly passes out as Silvers Rayleigh finally emerges with his giant prison mate, speaking of the money he stole back that he previously lost gambling. Everyone stares at his appearance, but Hatchan immediately identifies him as his friend and the coating engineer. Realizing who is on the octopus man's side with the trouble caused, he emits a mysterious energy that makes nearly everyone in the building faint, with the exception of the Heart Pirates, Kid Pirates, and Straw Hat Pirates and their allies. Rayleigh identifies Luffy by his straw hat immediately after his action, stating he had been wanting to meet him.
- Usopp lands on Roswald, angering the World Nobles even more.
- Brook and Robin also arrive at the Auction House.
- Luffy and Law meet each other for first time.
- Rayleigh breaks himself and a giant free.
- Rayleigh uses a mysterious ability to knock out Shalulia and all of the guards.
- The Straw Hat Pirates and Rayleigh meet each other for the first time.
- Episode 397 (p. 2-19)