Rony is an ordinary man sentenced to 15 years in prison for a crime he did not commit. In jail he will have to face the gangs and hard life behind bars while he dreams of recovering his family and proving his innocence.

Chile, 1970. During a night of heavy drinking, Jaime, a lonely 20-year-old young man, is sentenced to prison. There, he meets “The Stallion”, an older and respected man in whom he finds protection, and from whom he learns about love and loyalty. But as their relationship grows stronger, “The Stallion” faces the violent power struggles within the prison.