ONE PIECE VOL 7

Sanji and Luffy fight together against Don Krieg and his crews until Ging used Sef as a hostage to guarantee that Sanji will give up the ship. Sanji lets Paloo, one of Krieg's strongest crewmembers, hurt him without defending himself. Sanji didn't want Sef to die because Sef saved his life before. When Sanji was young, he was working on a cruise ship. His dream was to find "All Blue," the magical sea where you can find all the kinds of fish in the world. Then Sef invaded the cruise ship, and Sanji was washed out to sea by a storm wave. Sef jumped out of his ship and rescued Sanji. Both of them washed up on an isolated island without any food. Sef gave all the food he found to Sanji, and Sef cut off one of his leg and ate it to survive! The reason Sef saved Sanji is that they both had the same dream, to find All Blue. After 85 days, a ship finally came and rescued them from the isolated island. Sef decided to open the floating restaurant, with Sanji helping him. That's the reason why Sanji can't leave Baratie. Sanji's story reminded Luffy of Shank. Luffy told Sanji that Sef did not want Sanji to give up his life for this restaurant. Luffy will destroy the restaurant, so nobody will die. Ging has decided that he will kill Sanji by himself, but he can't because Sanji has been kind to him. Ging asked Don Krieg to leave this ship. Don Krieg was upset, so he used poison gas to kill everyone. Ging gave his oxygen mask to Luffy, so he breathed the poison gas instead.