A mystery set in an amusement park controlled by an AI, where 8 people have been invited on a free week to be the testers of this revolutionary concept. However, one day the energy of the place is suddenly cut and everyone becomes trapped in the park, and a murder suddenly occurs. Since help won't be reaching the place soon, they've got to catch the murderer quickly before he gets them all. In this murder mystery inspired mainly by Umineko no Naku Koro Ni, even you can try to guess the murderer!