It throws you into the deep end and never slows down to explain, which is exactly why the people who love it love it. Seventy-odd minutes to burn down Chaldea, strand you in a scorched Fuyuki, and introduce the shield-swinging Demi-Servant who would carry the entire franchise on her back: Mash Kyrielight, fused with a Heroic Spirit she doesn't understand yet, standing in front of Ritsuka because nobody else will. Lev Lainur's betrayal and Olga Marie's scream as she falls into the Chaldeas is the moment the tone snaps from mission briefing to horror, and it still lands. Cu Chulainn as Caster is the best kind of ally, and Saber Alter's Excalibur Morgan makes the stakes very simple. Yes, the exposition is dumped in your lap like a phone book. Watch it anyway, because everything after this only works if you were there when the timeline burned.

Chaldea, an organization devoted to humanity's survival, watches over two worlds: one visible only to magic, one measurable by science. Its researchers have secured mankind's path for the next century. Then everything collapses. The future they have been monitoring vanishes without warning, and the extinction of the human race is confirmed. The cause points to a single location, the Japanese city of Fuyuki in the year 2004, where an unobservable anomaly has appeared that never existed before. Chaldea issues the Grand Order and turns to Rayshift, an experimental form of time travel. Ritsuka Fujimaru, a recent recruit to Chaldea, and an enigmatic girl named Mash Kyrielight are sent back to 2004 to investigate the singularity and find a way to save mankind. The result is an action fantasy special about rewriting history so that humanity has a future again.