This is a relatively casual and free exploration game, where players will act as a house sleep tester (actually a special plainclothes police officer). The police have a task that requires the player to explore and investigate a villa within a limited time to find evidence of the villa owner’s crime. The entire game is quite relaxed, with almost no danger. Each exploration gives the player 8 hours (in-game time, real-time 2 hours) to freely explore the villa, and most of the items in the game are interactive.
In the game, besides the guided tutorial levels, there will be almost no guidance in the villa. The secrets within the villa need to be explored by the players themselves, and items that the player believes to be evidence or valuables should be marked. There are several types of markable items in the game, including non-evidence, general evidence, important evidence, key evidence, cash, and valuable items. Except for non-evidence, which is a deduction item, all others are bonus items. At the end of the game, these marked items will be settled, and different scores may result in different endings.