Based on the Anime phenomenon. The First Haruhi Movie!

SOS Brigade chief Haruhi Suzumiya has gone missing! It is up to loyal brigade member, Kyon to solve the mystery of the disappearance of Haruhi Suzimiya! But when the other members of the SOS Brigade cannot even remember who Kyon is things start to get even weirder. The SOS Brigade seems to have never existed and nor has Haruhi Suzumiya.