Episode 411

"The Secret Hidden on Their Backs - Luffy Encounters the Snake Princess" is the 411th episode of the One Piece anime.

Short Summary
Boa Hancock's ship reaches Amazon Lily and she returns to her palace. Elder Nyon, a former ruler of the island, urges Hancock to answer the summons in order to keep the treaty that protects her people, but Hancock refuses and throws her out a window. Hancock goes to take a bath, and some of the villagers discuss a legend that states that Hancock and her sisters defeated a Gorgon, but received eyes that turn anyone who looks at them to stone. Luffy, searching for someone from whom he can borrow a ship, falls into the bath. He sees something on Hancock's back that surprises him, but does not turn him to stone.

Trivia

 * Pandawoman makes an appearance in the scene after Hancok throws Elder Nyon out the window, when she orders to get her bath ready.