Julián (alberto san juan), a 50-year-old divorcee, uses the famous application to share his car with strangers and, especially, with someone who is not so stranger anymore: lorena (blanca suárez), a young woman who travels often to Madrid. For months it has had a fixed seat in his car and lately also in his heart. Julián wants to take advantage of the trip to be honest with her, but in a mistake when choosing the rest of the occupants (Ernesto Alterio and Rubén Corta), he includes a passenger (perhaps the most unbearable individual in the world) who will cause a radical change in the course of events.