Arpeggio of Blue Steel

"The I-401 and her intrepid crew, captained by Chihaya Gunzo, have escaped the trap set for them by the Fleet of Fog outside their home port of Yokosuka. Successfully returning home after two years away should be a triumphant occasion, but there are those who think otherwise. In fact, if they have their way, they will take the I-401--along with her mental model--Iona, away from Gunzo entirely and bring her back under government control"--Back cover.