You are a taxi driver in Paris, working the night shift while the city sleeps and wakes. You spend the hours driving passengers, talking when they want to talk, and sometimes serving as a priest, confidant, or friend.

Everything changes when the police reveal that recent murders in the city are connected. As their investigation stalls, they ask everyone to stay alert.

You decide to investigate on your own, especially because the victims were clients of your taxi company and you were the last person to see the most recent victim alive. Your advantage is your back seat, where passengers talk, open up, and share secrets.

Listen to them, collect clues, and try to stop the killer.