Upon learning of the treachery of former Azur Lane members Sakura Empire and Iron Blood, the present members of the alliance reunite for battle.

Reinforcements hastily attempt to fix the damage wrought by the Sakura Empire's surprise attack on the Azur Lane base.

The Royal Navy battle-maid Belfast arrives and sends the Red Axis into retreat. The focus shifts to Enterprise and it's clear she is key to Azur Lane's success, but also evident that her problems are worse than simple hull damage.

The Red Axis fleet arrive in Sakura Empire celebrating their successful strike against Azur Lane forces. Akagi checks the progress of her grand plans while Ayanami meets with her peers and reflects on the previous battles.

As the Red Axis fleet search for them, Sheffield and Edinburgh take shelter on a small island and must hold out until reinforcements arrive.

Azur Lane gains important intel on Akagi's Black Cube after performing the rescue mission, forcing both sides to regroup.