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.

Blood, drugs, bad company and easy money send Adry to prison for 10 years. When he returns to his old neighborhood, he must prevent his little brother Álvaro from following in the same footsteps and try to reconcile with him while fighting for his survival against the demons and violence from his past that return to torment him.