In a world where belief in aliens, time travelers, and espers is rare, high school student Kyon stands firm as a skeptic. However, his skepticism is challenged when he encounters the enigmatic Haruhi Suzumiya. Haruhi, dissatisfied with the ordinary, forms the SOS Brigade at school to seek out the supernatural. Kyon, inadvertently becoming a member, joins Haruhi along with Yuki Nagato, Mikuru Asahina, and Itsuki Koizumi, all harboring their own enigmatic backgrounds. As the SOS Brigade embarks on peculiar adventures, Kyon unravels the mysteries shrouding Haruhi, inching closer to the truth behind her peculiar nature.