Episode 422

"A Life-threatening Break-in! The Underwater Prison Impel Down!" is the 422nd episode of the One Piece anime.

Summary
Vice Admiral Garp talked proudly to his adoptive grand-son at Impel Down about some of Luffy's actions, and about Luffy's father, Dragon. Ace claims that Whitebeard is his only father since he took care of him after he went wild.

Meanwhile, on Vice-Admiral Momonga's ship in Boa Hancock's disguise, Luffy is worried about Ace. On the deck of the Marine Ship, Momonga spotted Captain Buggy's ship and it seems familiar to him. The Buggy Pirates spotted a Sea King that emerged adjacent to them and fell back into the sea. The Buggy Pirates were worried about their Captain that was taken away to Impel Down and wanted to free him but it would be impossible for them to break inside. Alvida suggests that they should take a small boat if they want to get to Impel Down but it would be too dangerous for them so the Buggy Pirates decided to quit the breakout attempt.

Prisoners of Impel Down were being tortured and a new guy in prison refuses to obey the Boss prisoner's rules and got into a fight with another prisoner. A Minotaurus stopped them and took them two to a different prison cell where they were eaten alive.

Momonga's ship arrived at Impel Down and opened the Gate of Justice. Other Marine ships were at the entrance of Impel Down too. With all of the Marine ships, Luffy thought that someone used a Buster Call. Momonga, Hancock, and Luffy, hidden under Hancock's cloak, departed to Impel Down. Hancock couldn't take more of the Marine's love for her but Momonga suggested to her not to petrify them. Just then, Buggy the Clown escaped from his cell.

Prisoners inside Impel Down were screaming. Hannyabal greeted Momonga and Hancock at the prison. Hannyabal told Momonga that he wanted to see Warden Magellan of Impel Down. Vice Jail Manager Domino escorted Hancock to a room where she could privately search Hancock as usual with all visitors. Domino took her search on Hancock seriously by making Hancock wear a Kairoseki handcuff to disable her Devil Fruit powers. Hancock accepted it but her heart is beating from the tension.