You can read manga one piece chapter 690 at this online popular manga site. Here is the summary of One-Piece chapter 690: Luffy continues his fight with Caesar Clown after punching him leaving a deep imprint on his face. Clown then tried again to flaunt his protection under Doflamingo in order to intimidate Luffy, but Luffy still continues to fight, delivering another punch to Caesar's face after dodging a surprise attack from Caesar Clown.
With five minutes left until Shinokuni fills up building B, the rest of the Straw Hats as well as their allies are hurrying toward building R where the escape route off the island is located. Only Kinemon and Brook went the opposite direction towards the gas because Kinemon heard from one of the children that his son got turned into a dragon and immediately thought that dragon he slew was his son. Usopp was the first to arrive in Building R but ended up in the secret room above the floor where the gas trap was prepared.
In the SAD room, Vergo has defeated Smoker because of his overuse of his smoke form, but it was really a distraction in order to take Trafalgar Law heart and return it to him. With Law's heart back where it belongs, Law is ready to end the fight. Law then calls out to "Joker" telling him that with Vergo defeated and Ceasar captured, all the SAD at his disposal will be gone and will lose his position in the underground. Doflamingo then laughs replying that Law's fear of Vergo is still there and his Haki protects his whole body that not even Law's power can hope to cut him. He was proven wrong when Vergo was cut in half, along with the SAD chamber and the mountain it was built in. Law then states that the marines never challenged any of the big name pirates because they were preparing a new battle force and like his former captain said, a new unstoppable wave always marks the beginning of a new era and that Law plans to destroy the cycle.
