Jon's influence on Quique leads to trouble. Biel is blindsided when family complications show up at work. Patricia receives a disturbing warning.

Néstor's suspicions about Sophie grow, and Patricia helps him investigate her past. As the ER buckles, Pilar's decisions push Jésica to the brink.

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.