In this final season, as enemies become allies, Álex gets an answer to the question that has tormented him for years: What really happened to Sara?

Alex Guzman has to face his worst nightmare: his sister's Sara true personality, whom clearly he never knew at all. At the same time, a buried mystery corpse in his own patio becomes a ticking clock that can make him go back to prison at any time. He has no other choice than to become an investigator and put together all the pieces that will portray Sara's true and terrible story and her relationship with the Lazcano family.

His sister was killed in a freak "accident", for which he was blamed. While trying to find what actually happened, Alex Guzmán will uncover the darkest secrets of the Lazcano family, stopping at nothing until everyone is held accountable.