Oscar, Simon, and Aïssa, three childhood friends, go to Paris to celebrate some good news. But on the night bus taking them home—the N121—an exchange between passengers spirals out of control, and the situation quickly goes off the rails.

Friday, July 4 marks the end of a chapter for Sacha: her final day of drama school and the beginning of the long road to finding her place as an actress. That very evening, she heads to the Avignon Festival. She sets off in her van with four friends - a journey to come to terms with failure and to prove, to her family and to herself, that she made the right choice.