is one piece episode 400 filler?

The Heart Pirates are still fighting off the remaining Marines at the auction house, tearing through them to escape. However, they come across the Kid Pirates, most of whom are already wounded due to Kuma.

The Shichibukai immediately identifies and attacks Law, but Law manages to dodge the attack. With the Marines starting to close in from behind, Kid and Law, despite their mutual dislike of each other, tell Kuma they are leaving and prepare to face him.

In Grove 8, Peterman has been thrashed by the Straw Hats and the Rosy Life Riders for his earlier abduction of Camie.