Play as hard-boiled detectives cooperatively investigating 12 cases. Every case has clues with symbols that must be matched to unlock their secrets. Players must wisely play their Lead cards to match the symbols on the clues to reveal what the clue offers: which can be important information, the addition of new clues to uncover, or a plain dead end. Players can get hot tips that will help them investigate – but watch out for plot twists that will complicate your investigation. When the investigation of the case is over, you must answer questions – the more you answer, the better detectives you are.