A lawyer, Valerio Rossello, and his wife, Lucia, have a son, Mauricio, a young men about 20 years old. The son carries a lazy and disordered life, a bad student, not working, and with bad friends. The mother is overprotecting and the father is rigid and serious. A night, Mauricio returns home bleeding. He and a friend have attempted to assault a man who carried a big amount of money, and run away from the city with the money. But it fails, and the man is shot by Mauricio with a gun, and they have to escape. The father, when Mauricio returns home bleeding and answering with lies to his questions, obtains finally the truth. After a lot of cries among mother, father and son, the lawyer decides call the police and defend his son in the trial.