Things are getting lonely at the Masaki house. Washu is locked up in the lab, Kiyone is busy planning for a promotion, and Ryoko has left the Earth entirely! Together with her new partner Hotsuma, Ryoko has returned to the life of a space pirate, and her first target is none other than the galaxy's Federation bank! Will this daring robbery make or break the alliance between Hotsuma and Ryoko?