Those that don’t know they are in a LARPing event don’t like it when they find out what happened.
A group called Improv Everywhere decides that an unknown band, Ghosts of Pasha, playing their first ever tour in New York, ought to think they’re a smash hit. So they study the band’s music and then crowd the performance, pretending to be hard-core fans. Improv Everywhere just wants to make the band happy—to give them the best day of their lives. But the band doesn’t see it that way.