Be aware that Episodes 279-283 are entirely recap episodes. Episode 290 is part of the direct continuation of the battle.
Episode 290 is part of the intense, non-stop battle on Enies Lobby. It focuses on the crew navigating the chaotic battlefield to reach Robin and Franky. Helpful Tips for this Episode EP 290 SUB
This episode is action-heavy with minimal filler. It is a critical, high-paced part of the arc. Be aware that Episodes 279-283 are entirely recap episodes