Suzumiya Haruhi no Shoushitsu

Alternative Titles
English: The Disappearance of Haruhi Suzumiya
Synonyms: The Vanishment of Haruhi Suzumiya, Suzumiya Haruhi no Syoshitsu, Haruhi Movie
Japanese: 涼宮ハルヒの消失

Information
Type: Movie
Episodes: 1
Status: Finished Airing
Aired: Feb 6, 2010
Producers: Kyoto Animation, Kadokawa Shoten, Bandai EntertainmentL, Animation Do
Genres: Comedy, Mystery, Romance, School, Sci-Fi, Supernatural
Duration: 2 hr. 42 min.

synopsis
Following on from the events of The Melancholy of Haruhi Suzumiya anime series, the story takes place from December 16 until December 24, a month after the cultural festival. The SOS Brigade, led by Haruhi Suzumiya, makes plans to have a nabe party for Christmas. However, on the morning of December 18, Kyon arrives at school and finds out everything has changed. Haruhi, along with Itsuki Koizumi, are missing, Ryoko Asakura has mysteriously returned, Mikuru Asahina does not recognize him and Yuki Nagato is an ordinary human, complete with emotions.

Only Kyon is aware that everything is different, as no one remembers anything about Haruhi or the SOS Brigade. The only clue Kyon manages to find is a bookmark left by the alien version of Yuki before everything was changed, telling him to gather 'keys' to run a program. While wondering about this clue, he gets to know the new Yuki, who appears to be quite fond of him. As December 20 comes, Kyon learns from Taniguchi that Haruhi was at another high school the whole time, along with Itsuki and others formerly from his school. By revealing his identity to her as 'John Smith', an alias he had used when he travelled back in time to assist a young Haruhi, Kyon manages to convince Haruhi to believe his story. With her assistance they gather the SOS Brigade together in the club room, thus bringing the keys necessary for a program built by alien Yuki.