The mystery of the mass kidnappings in Fuyuki remains unsolved, with more kids disappearing daily. When Tohsaka Rin can't get in touch with her friend Kotone, she braves the darkness and enters the city on her own to search for her. That's when she spots a strange man leading two kids around and decides to follow him...

Seeking the power of the Holy Grail, something that can make miracles occur, seven different mages summon seven Heros, and fight until the last man remains--a battle of epic proportions, the Holy Grail War. In preparation for the war, various participants are chosen from all over the globe. Eight years ago in Einzbern Castle in Germany, a girl named Illyasviel is born. Her father, Emiya Kiritsugu, embraces her knowing he will be part of the battle, as well.

The girls are hanging out at a candy store in the middle of summer vacation. When Kanae suggests they do something special for summer vacation, they begin throwing around ideas.

Usopp uses Viola's Clairvoyance to prepare his ammunition to take Sugar out! But the slightest hesitation now will spell disaster -- and the end of Luffy! Luckily for the Straw Hats, Usopp's ammunition has been specially designed for this specific situation!

Chrono and Tokoha are still reeling from Shion's sudden announcement that he's quitting Vanguard. They do everything they can to persuade him to do otherwise, but Shion won't budge. Chrono finally resorts to one last desperate gambit to keep TRY3 together.

Now that Isla and Tsukasa are officially a couple, they are more nervous around one another than normal. They seek advice from their coworkers on how to deal with their new relationship jitters.

While Saber faces off against the guard at the gate, Shirou and Rin try to destroy the Holy Grail!

Faced with the final battle, both sides head into the battlefield once more to protect the futures of their worlds. In the 2015 Shibuya that has the giant Energy Cube, the fierce all-out war begins.