A young man named Sergio has not spoken a single word since he tragically took the lives of his parents in his childhood. Now, a psychiatrist is determined to uncover what really happened on that fateful day. He delves into a complex investigation. Sergio was just a little boy when he pushed his father and mother off the balcony. After serving his time in prison, he becomes a participant in a special observation program. A doctor named Ana tries to uncover the hidden truth behind Sergio's years of silence.