Fate/stay night [Heaven’s Feel] III. spring song is an anime film that premiered in summer 2020, produced by ufotable.

About the production: the story comes from a visual novel, the film runs about 122 minutes and its current status is "finished".

Its main genres are action, drama, fantasy, psychological, supernatural and thriller, with themes such as Urban Fantasy, Magic, Anti-Hero and Battle Royale.

On AniList, Fate/stay night [Heaven’s Feel] III. spring song has an average score of 85%, one of the highest scores on the site, and appears on 121,181 users' lists.

The franchise continues in or follows from: Fate/stay night [Heaven's Feel] II. lost butterfly.

To save the girl, to enact the justice he's chosen...The young man will no longer turn a blind eye to the truth. Mages (Masters) and Heroic Spirits (Servants) work together in the battles of the Holy Grail War, a fight for an omnipotent wish-granting container called the Holy Grail. However, this war has become horribly twisted. A young woman named Sakura Matou, with the sins she has committed, drowns in the murky darkness. A young man named Shirou Emiya, who vowed to protect Sakura, works together with Rin Tohsaka and throws himself into the raging battle to put a stop to the Holy Grail War. Illyasviel von Einzbern, as one of the few who knows the truth behind the conflict, confronts her own fate, while Zouken Matou uses Sakura to try to fulfill his own desires. Will the young man’s wish reach her even as he challenges fate itself, battling against the rising tide? The Holy Grail War is coming to an end... The final battle is about to begin. (Source: Aniplex of America)

Official synopsis from AniList.