Jáuregui reveals the truth about Susana's murder. Vista's past explains his obsessions and his next moves. The BAC begins a frantic search to prevent new crimes. Chesca and Orduño discover a closet with hard drives full of torture videos, including one that especially impacts Elena. A violent outcome seems to put an end to the case, but Elena receives a shocking message. A new investigation looms on the horizon: The Purple Network.