Fate/stay night: Heaven’s Feel III. Spring Song

After Shinji's attempted rape, Sakura fuses with the Shadow and kills him, cutting off his threat. Zouken Matou taunts Shirou about Sakura's corruption as the implications of her fusion become clear. Rider arrives just in time to rescue Shirou from the danger surrounding the Matou household.

Sakura, aided by Saber Alter, storms the Emiya Household and subdues Rin to seize Illyasviel. Illya is treated as a potential Holy Grail vessel, raising the stakes for everyone. Shirou and Rider arrive too late to prevent the kidnapping, and Illya chooses to surrender for the group's safety.

Sakura's final command spell binds Rider to protect Shirou, preventing a direct strike on Sakura. Desperate, Shirou seeks help from Kirei Kotomine, hoping to turn the tide. This marks a dangerous turning point as alliances become uneasy and uncertain.

Kirei distracts Zouken and Assassin to give Shirou a chance to reach Illya. Sakura sends Berserker in pursuit, escalating the chase through the ruined Einzbern Castle. Shirou unseals Archer's transplanted left arm and, using Archer's magic, replicates Berserker's weapon to defeat him.

Kirei destroys Zouken's body, forcing Assassin to retreat and signaling a turning point in their plans. He recalls his Grail wish as proof of his twisted nature. This moment heightens the peril surrounding Sakura and Illya.

Sakura confronts Kirei and destroys the artificial heart implanted for the last Grail War. Berserker's defeat leaves Sakura overwhelmed and momentarily vulnerable to Angra Mainyu's influence.

Illya and Rin reveal Sakura's corruption through the Shadow and Angra Mainyu's influence. They guide Shirou through their memories to understand the Grail's true purpose and Zelretch's Jeweled Sword, a process that costs him Archer's arm.

Zouken plots to bind Sakura as his vessel, his true body hidden near her heart. Sakura fights back by absorbing Assassin with the Shadow and tearing Zouken free from her chest, crushing him.

Shirou earns Rider's trust to save Sakura, and the team moves toward Fuyuki Cave where the tainted Grail awaits. Saber Alter blocks their path, and Sakura's orders allow Rin to pass while Shirou and the others press on.

In the Grail chamber, Shirou and Rider subdue Saber Alter so Shirou can kill his former Servant. Rin uses the Jeweled Sword to cut through Sakura's shadow minions, but Sakura laments feeling abandoned by the world, and Rin is impaled while apologizing.

Sakura attempts to sacrifice herself to stop Angra Mainyu, but Shirou intervenes. He uses Caster's Rule Breaker to sever Sakura's link to the Shadow, ending its hold on her.

Although the Shadow is purged, Angra Mainyu still threatens to emerge from the Grail. Rider evacuates Rin and Sakura to safety as Shirou prepares to destroy the Grail, but a dying Kirei interferes.

Illya reveals herself as Shirou's older sister and uses the Heaven's Feel ritual to save him by separating his soul from his dying body and destroying the Grail. Irisviel's spirit is reunited with her.

In the aftermath, Rin and Sakura revive Shirou by granting his recovered soul an artificial body crafted in Touko Aozaki's laboratory. A fragile peace begins to settle over the world.

Shirou and Sakura resume their relationship with Rin, Taiga, and a now-incarnated Rider by their side. They go to see cherry blossoms, keeping a promise and finding a moment of peace after the war.