Netflix India describes the story:
New foes and old allies emerge when the peaceful new queen is abducted by terrorists and Lelouch must rise again to save his sister.
Director Goro Taniguchi and many of the key staff members returned for the movie. The film's story begins in the world two years after Zero Requiem. The story is complete in one film, serving as a finale.
Leo Ieiri performed the opening theme song "Kono Sekai de" (In This World), and Unione performed the ending theme song "Revive." In addition, Ali Project performed the insert song "Utsukushiki Kemonotachi no Tame no" (For the Beautiful Creatures).
The 25-episode first television season premiered in Japan in October 2015, followed by the second season in October 2016. Netflix India is also streaming both anime series on its service.
Source: Netflix India