On the planet Amoi, a person's status is primarily dictated by the color of their hair. This society is run by the AI supercomputer known as Jupiter and its governing board of perfect blondes, referred to as Blondies, living in the capital city of Tanagura. However, the darker-haired humans live out their lives in the golden "pleasure city" of Midas and its outlying slum Ceres. They are known as "mongrels," and most cannot progress out of the slums. Three years ago, a boy named Riki disappeared from the slums of Ceres. Once the revered leader of the gang Bison, a sudden encounter with an elite Blondie, Iason Mink, forced Riki to abandon everything he had cultivated. The boy was snatched from his home and forced to become Iason's pet. Riki has spent the past three years enduring numerous blows to his pride, his time in Tanagura nothing but a form of torture. Now that Riki has returned, Bison once again rallies behind him. The risk he finds himself in, however, is much greater than ever before—there is always someone ready to sell him out.

Hurricane Keiko has arrived! The newscast weather segment. Usually the last thing anyone ever thinks about (unless they said "sun" and it wound up being "rain") but Keiko Nakadai's going to change all that. Toiling in obscurity for years at a horribly rated TV station, Keiko has figured out what the weather report needs and doesn't mind taking off her top (or lifting her skirt) on the air to do it. The ratings aren't going to go down, that's for sure. Of course, some of the people at the station don't find this appealing, and decide that Keiko's got to go. They devise a series of horrible "accidents" for her, but Keiko usually seems to be about a step ahead of them. Eventually, everyone at the station will discover that there's far more to her than meets the eye as Keiko's star rises incredibly quickly ... and as her importance increases, Michiko Kawai's (the old weather girl) drops. Something has got to be done, but who can do it?

The successor and branch manager of the Himeya Company—one of the many Undine associations housing female gondoliers—Aika S. Granzchesta surprises everyone when she rejects tradition and refuses to inherit the company's legendary gondola. Aika's apprentice Azusa B. McLaren, unable to wrap her mind around her mentor's unexpected decision, confronts her directly but to little effect. To better understand her reasoning, Azusa and her fellow Undines secretly plan to arrange a meeting with Aika. With the much-awaited winter days in sight, accompanied by the tranquility and sublimity of Neo-Venezia, Aika reminisces about her journey as an Undine that forged her into the person she is today. As she vividly remembers all those invaluable experiences of the past, she trusts they will continue to guide her into the unknown yet boundless future.

Second Season of the final arc of Gintama.