Laura has been with Antonio all her life and, just when she begins to wonder if that is really the life she wants, Sergio and Siena cross paths in their lives. Sergio is a former high school classmate and Siena, his millennial girlfriend who arrives to revolutionize everyone's lives. Laura, Raquel and Cris, close friends for years, convince their respective husbands to play a game that Siena proposes to them: the game of keys. The game consists of everyone putting their keys in a bowl. At random, each one chooses some keys and he must go to spend the night with the owner of the keys. This game will revolutionize the group of friends and their lives. It will make them discover who they are and what they really want.

Diego has just been voted best young player in Europe and at the age of 20 he is on his way to making his team, Atlético de Madrid, champions of La Liga. But his impulsive and conflictive character makes the club, fed up with his excesses, hire Álex, a withdrawn and lonely psychology professor, to improve his behaviour. The two will have no choice but to learn to understand each other.

Introverted Girona student Nacho meets two delinquents from the city's Chinatown and gets caught up in a summer onslaught of burglaries and hold ups that will change his life.