Spain, 1982. Marisa decides to take her daughter to Madrid to find a solution for an unwanted pregnancy. Lucia ends up in Peñagrande, a reformatory for pregnant teenagers. There, she will forge strong friendships with the other girls and discover the awful truth that her still unborn child is to be taken away from her.

How would you react if you were a Martial Arts expert, had a Katana in your hands, and your daughter had just been kidnapped. Under this premise, Sensei Marín launches a race against time with Nacho, his best friend.