Original: Serpientes y escaleras
An ambitious but overlooked teacher wants to be head of a prestigious school, but must climb a slippery ladder of lies and corruption to reach the top.
When two kids get into a playground fight, their powerful parents enter a dispute. In need of money, Dora considers accepting a bribe to take sides.
Dora makes a deal with Toño who now has to befriend Olmo's daughter. Vicente and Tamara suspect Dora is helping Olmo and deliver an angry threat.
Olmo publicly backs Dora's campaign to be principal but discovers she is not too popular. Meanwhile, Vicente tells Tamara he wants to return to Spain.
Toño reveals a long-held secret to Dora but gets an unexpected reaction. At the school, Tamara offers to support the principal's election campaign.
After finding out his son's hidden truth, Antonio unleashes an ugly rant on Toño. A stressed Dora fights with the principal and threatens to quit school.
After a sudden death, the ensuing funeral descends into chaos as Juana makes a discovery about Nicolás while Dora sees Tamara in a compromising position.
As Dora returns to the school, Olmo's proposition persuades the principal to go ahead with the school election, but the final result causes a surprise.
Olmo's plan to disgrace Vicente and Tamara backfires in a very public fashion. A scheming Dora makes a shocking alliance to land an unlikely role.
