is one piece episode 397 filler?

Luffy apologizes, knowing that his actions would bring an Admiral and a warship down from the Marine Headquarters to Sabaody Archipelago. Zoro is disappointed that he is denied his chance to cut Saint Charlos.

Chopper says that he will tend to Hatchan's injuries and asks Franky to search for the key to free Camie. Saint Rosward is furious and fires at Luffy.

The audience panics and evacuates from the building, with the exception of the Kid Pirates, Heart Pirates and the Celestial Dragons. Sanji attacks Rosward and kicks the gun from his hands.