Alex, a young man about to become a father and struggling with the acceptance of his homosexuality, and his girlfriend Anna join their friends on a warm summer night in Barcelona for a lively night out. The unexpected arrival of Marc, an old friend of Alex's from London, brings with him revelations that challenge their relationships and detonate their secrets.

Mónica meets Joaquín in a bar to tell him about the strange phenomenon that is happening to her: everyday everyone around her starts to dance out of nowhere.