Quick recap
A 2014 TV special, non-canon, set during the two years of training. Luffy trains with Rayleigh on Rusukaina, still shaken by Ace's death. Byrnndi World, a dangerous pirate who broke out of Impel Down, attacks, takes hostages and mocks Ace's death. Hearing that gives Luffy the push he needed, and he beats World. The Marines destroy the pirate's ship. The special ends months later, with Luffy reuniting with his friends on Sabaody, ready for the New World.
No spoilersOpens once you mark the title as seen.