Ah! My Goddess: The Movie

Celestin, a former mentor to Belldandy, is released by Morgan Le Fay and uses a virus to erase Keiichi's memories from Belldandy. The attack severs Keiichi's memory link and sets in motion a plan to hack Yggdrasil in the heavens.

Morgan frees a seal in the Lunar Prison on the Moon. A mysterious message then arrives urging them to unite for a common goal.

The New Year begins on Earth with the Motor Club unveiling vehicles for an upcoming mixed-gender race. A new two-seater, built for Keiichi and Belldandy, marks a new chapter for their team.

That night, a near compromising encounter is interrupted when Celestin kisses Belldandy and injects a fresh version of the virus. The infection threatens Belldandy's mind and deepens the crisis around Keiichi's place in her memory.

Peorth alerts Urd that Yggdrasil is compromised and the Heavens isolate themselves from Earth. Belldandy cannot receive treatment as the connection to Yggdrasil is severed.

Belldandy awakens with selective amnesia, unable to recall Keiichi but recognizing her sisters Skuld and Urd. Skuld's inventions fail to restore her memories, and Keiichi resolves to live normally despite the condition.

Worried about the upcoming race, the Motor Club accepts Morgan's offer to replace Belldandy. After a trial run with Keiichi, Belldandy regains faint memories and Keiichi nearly crashes during the test.

Belldandy discovers a photo album filled with their shared memories and decides to remain Keiichi's partner for the race. Morgan challenges them to a race alongside Megumi; their victory unlocks more of Belldandy's memories.

Belldandy overhears Celestin's manipulation and is lured away, allowing him to turn her against her elder sister in battle. Keiichi and Skuld arrive, triggering a surge of uncontrollable energy from Belldandy that devastates the surroundings. Skuld summons Noble Scarlet to confront Celestin; Celestin is knocked down but triggers a flood as Keiichi shields Belldandy and falls into a coma.

Back at the temple, Belldandy is shaken by the damage and is comforted by Skuld, who reminds her of the strength of their friendship and shared experiences. She resolves to seek balance and trust in her bonds with Keiichi.

Keiichi finds Morgan injured and insists on taking her to the hospital. Morgan forcibly kisses Keiichi, a moment witnessed by Belldandy that deepens the emotional tension between the trio.

Belldandy prepares to undergo a vaccine that could erase memories to destroy the virus. The virus exploits her link to Yggdrasil and rewrites itself to bypass security, while Celestin hacks into Yggdrasil's core via Belldandy and pulls a top-secret program into the vaccine's mandala, creating a massive field that engulfs the temple and forest and materializes a colossal being.

A flashback reveals Celestin's rebellion against the Gods' indifference to mortal suffering. After an attempt to destroy the Gate of Judgment, he was imprisoned in the Lunar Prison, and Belldandy's memories of that event were erased.

The Goddesses unite to stop Celestin and Morgan from destroying Yggdrasil and Earth, a plan that would require creating a new world free from suffering. Peorth authorizes using the spear Gungnir, but Belldandy shields Celestin from the attack to protect Keiichi. Keiichi borrows Celestin's power to help Belldandy block the strike, convincing Celestin to relent and release Keiichi from possession.

Belldandy, Keiichi, and Morgan are transported to the Gate of Judgment; after facing the test, they return safely to Earth. In the Heavens, Yggdrasil is critically damaged as the goddesses sing to restore the World Tree, and Belldandy reveals that the virus deleted Yggdrasil's records, freeing Keiichi to make any wish; he simply says, That's easy, rekindling their love.