Class of 2024 go on a senior trip together to Camp Owanaka. A tradition the school does every year. Each cabin holds 4 people. The groups are picked at random. Kuroo Tetsuro, Matsukawa Issei, Semi Eita, and Oikawa Toru all become one group. Throughout the trip your cabin mates are your group mates for the rest of the time. You do all of your activities with each other. One night, Semi Eita, the rebel, sneaks out past the 10 o'clock curfew and decides to go on a little night hike. He doesn't bring any gear but his phone flashlight. The others see him leaving and decide to follow him. That's when they run into trouble.