Luffy finally reaches Caesar's room and immediately punches the scientist, while Smoker leaves in order to find Vergo. Meanwhile, Sanji faces off Vergo while the passage between buildings A and B is closing and the previous one is opening, letting the poison gas enter. During the fight with Caesar, he tries to drain the oxygen in the area to kill Luffy, but fails once he enters Gear Second and use some attacks with Haki, making the scientist angry to the point of using some techniques as oxygen-made sword and fire bursts. Meanwhile, both Sanji and Vergo start running away from the gas. During this fight, Trafalgar Law makes his way to building D, where the SAD is made and Monet decides to enter the fight to protect Caesar, while he flies away, and reveals her snow abilities. (thetvdb.com)