In the film, Mignogna (whose character is simply credited as "The Fan") receives a reproduction of the State Alchemists' silver pocket watch one day, and wakes up the next to discover that the world is becoming more and more like the world of Fullmetal Alchemist, with himself transforming into Edward and other members of the cast appearing all around the city, with Scar appearing at the end disguised as the postal worker who delivers the watch.
—Wikibin