Álvaro starts working for Los Pajaritos and loses the support of Carlos, who receives a brutal ultimatum. Kill Mario or they will kill Nina. Marina confesses to Saray that she came to CIMI for abandoning her newborn baby.

Upon returning to the CIMI, Saray clashes with Álvaro, and, under Violeta's influence, Marina abandons her. In an effort to shield Álvaro, Carlos successfully pits Ray against Álex, while Los Pajaritos relentlessly tighten the noose, pressuring him to put an end to Mario once and for all.