School's out, which can only mean one thing: camp! Cuphead has been looking forward to summer at Camp Hootenholler for ages. He can't wait to shoot some arrows, swim in the lake, and sit around doin' nuthin'. When he arrives with his best buds Mugman and Ms. Chalice, however, the trio quickly learns about the camp's bitter rivalry with neighboring Camp Punchafink. Before long, the two camps are in an all-out prank war. One night, after a midnight raid on the Punchafinks, Cuphead and his friends wake Glumstone the Giant - a towering mountain who lives in the valley between both campsites. Tired of being disturbed by the camps' hijinks, grumpy ol' Glumstone decides that he's had enough: Whichever camp loses the annual camp-etition this year will have to shut down... for good! Can the Hootenhollers rally together to take down the Punchafinks, or will the campers be sent packing once and for all?