Quique confronts Jon as patients arrive at the ER with similar symptoms, which the team fears may be linked. Lluís' new romantic status spreads fast.

Pilar and Nicolás clash over hospital management. As Patricia's election looms, Néstor digs deeper into Sophie's work. Rocío finds herself in trouble.

As Néstor and Biel plot to regain Sophie's trust, an explosion at a school sends a wave of patients to the hospital. A new doctor arrives unannounced.