You are a taxi driver. Paris is your city and you know every corner of it.
Your shift starts when the night is dark and ends when the city wakes up. You work hard to pay back your car, your taxi license, and your bills.
At night, passengers hop in your taxi. Sometimes you talk to them, sometimes they talk to you. You are not only a driver; for some people you are a priest, a confident, a friend. You like this routine.
Everything changes when the police reveals that the recent murders shattering your city are connected. As their investigation is stalling, they ask everyone to keep their eyes peeled.
You want to do more. Because the victims were all clients of your taxi company. Because you are the last person to see the most recent victim alive...
You begin to investigate with your only advantage: on your backseat, people talk, open up, share secrets. So listen to your passengers, collect clues, and stop the killer.