Aoki Hagane no Arpeggio: Ars Nova Movie 1 - DC

The Fleet of Fog controls the oceans, isolating nations and leaving humanity with little room to maneuver. Gunzou Chihaya commands I-401 alongside Iona and his crew on a mission to carry a potentially decisive weapon through that blockade.

Their encounters challenge the division between people and the Fog’s humanlike Mental Models, but I-401’s allegiance has consequences. Hiei and her Student Council appear to enforce the fleet’s order, bringing a new confrontation for a submarine that has chosen its own course.