Although she despises the Peralta family, Catalina accepts the mission to reintegrate herself into their lives and gather information. She knows the success or failure of her comrades' plan depends entirely on her.

Gina reveals the whole truth about her illness to Sofía, hoping it will be enough to keep her away from Franco. The news shocks Aramís, who suffers from the same condition and begins to suspect that the two of them may share the same bloodline.