Azur Lane forces advance into the open seas to take on the Red Axis. Under Akagi's command, the full Sakura Empire navy assembles to meet them. As Observer watches from outside the battle, the two forces collide head-on.

Enterprise is haunted by recurring nightmarish vision and unable to fight. Akagi is missing, presumed dead. Without their flagships, neither Azur Lane nor Red Axis are able to make a move. The Sirens are determined to change that.

The Orochi proves to be much more powerful than the most advanced technologies humanity has to offer, and Enterprise is knocked out by a huge explosion. The battle is at its final phase as each combatant faces the truths they seek through battle.