"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.

Lord Boxman’s main investor, Cosma, threatens to pull her funding if he continues to attack the Plaza instead of building robots as he is supposed to. While Boxman thinks he can manage, he has trouble ...