It's Saturday night and Pilar doesn't want to see anyone or go out. The solitude of her apartment is exactly what she needs. Until the doorbell rings and her boyfriend Marcos arrives, with immediate plans and others for the future that may not be the same as Pilar's. It is a fact: the immediate ones are far from her, she wants to be alone and calm. But that's not going to happen, because the doorbell rings again, and now it's Ema, her sister, who comes to tell her about the bad time she's having with her husband. The doorbell will ring once more and the peace of Saturday will be completely over with a situation that will change their lives.