Oscar and Hedgehog are dropped off at a strange summer camp, full of fantastical things ranging from magical camp counselors to sticky notes that are portals to other dimensions.
OK K.O.. Let's Be Heroes follows the titular character, K.0., and his efforts to become the world's greatest hero while working at Gar's Bodega, a hero supply shop in the Lakewood Plaza strip mall. Alongside him are his best friends and co-workers Radicles, an apathetic, narcissistic alien, and Enid, a levelheaded big sister-like employee, as well as other heroes who work and frequent the area.