The "Case Proving Ground" constructed by unknown forces, the space is modeled on unsolved unsolved cases and strange murders in reality, creating a closed theater. Each theater corresponds to a "mirror case". Players need to solve the truth of the case within the specified time, and at the same time abide by the theater's exclusive "survival rules, solving crimes and mutual relations". If they fail, they will be wiped out by the space, and their consciousness will become the "case nourishment" of the theater.
Purpose: Solve crimes and defend each other