The company describes the film:
This is the actual ending.
The countdown to destruction has begun! All will join to reclaim an Edo in grave peril!
Earth is facing its darkest days, and the members of the Odd Jobs must come together to save it from an otherworldly menace.
Old allies Gintoki, Takasugi, and Katsura strive their hardest for their own ideals, but standing in their way is someone with whom they share a sad history: Utsuro, an alternate personality of their former teacher and mentor, Shoyo. Having been spawned by Altana, the energy that fuels all planets, this immortal fiend has regenerated multiple times until finally becoming Utsuro, the ultimate enemy… And he intends to take down the entire world in order to end his own life.
Gintoki and the others set out to fulfill the wishes of their teacher Shoyo and thwart Utsuro’s plans. Shinpachi, Kagura, the Shinsengumi, members of the Kabuki District, and even former enemies will join their fight.
As Utsuro’s power grows, Takasugi fights for his very life.
Will Gintoki be able to put an end to all this?!
The film opened at #1 in Japan on January 8 and ended Demon Slayer – Kimetsu no Yaiba – The Movie: Mugen Train‘s 12 consecutive weekends at the top of the Japanese box office. The film is based on the finale of the original manga, combined with new story elements. It has earned a cumulative total of 1,850,391,800 yen (about US$16.94 million) as of mid March.
The manga also inspired a new net anime special titled Gintama The Semi-Final with a story that served as a two-episode prequel to the film. The net anime premiered exclusively in Japan on the online dTV service on January 15. The film also has a novel by Mirei Miyamoto that shipped on January 8.
Sorachi’s original “science-fiction period-drama comedy” manga began in 2003 and ended in June 2019 with over 55 million copies in circulation. The manga has inspired several television anime series with 367 total episodes, as well as two previous anime films. The latest anime series premiered in July 2018. The manga has also inspired various original video anime (OVA), event anime, two live-action films, and two live-action net spinoffs. Viz Media published the manga’s first 23 volumes in English.
Source: Press release