A family faces danger after being reunited in a dystopian Madrid; Julia's attempts to rescue an abused minor results in grave consequences.

Hugo asks Julia to pose as her twin sister Sara in order to get the proper documentation to recover Marta; The police search for Merida's killer.

Alma continues her medical experiments on the children, despite serious repercussions. Julia grieves her loss. Álex makes a new friend.

New Spain's citizens rise up in revolution as the virus continues to spread rapidly, infecting even the most unexpected of people.