每晚十二点关门的咖啡店，半夜遭遇窃贼，收银处的纸币全都不翼而飞，而硬币却一个也没少！吉他老师被害，嫌疑人只有一个，而能指认罪犯的只有一个"证人"，一个不会说话的"证人"！(The coffee shop that closed at 12 o 'clock every night was robbed in the middle of the night, and paper currency at the cashier's desk were all gone, but the coin didn't lose at all! The guitar teacher was murdered, and there was only one suspect.. There was only one "witness" that can identify the criminal, and the "witness" can't talk!)