When a kingdom is taken over by tyrants, the deposed princess begins a quest to find a disbanded group of evil knights to help take back her realm.

This is a slightly peculiar world where the shipgirls live in. A lively and enjoyable school life for girls from different factions will begin at the naval port of Azur Lane. Living out their lives to the fullest, these girls get into various shenanigans--slowly but surely!

The Seven Deadly Sins aid the Sky People against a powerful group of demons hellbent on resurrecting a demonic beast sealed over 3,000 years ago.