After leaving their criminal past behind, Maru and Mica have not spoken to each other for years, until the arrival of a mysterious envelope brings them closer.

Paola warns Maru and Mica that it's time to collect the favor they owe her: they have to put Lucas Romero to sleep and hand him over, otherwise she'll reveal their secret. Maru's friends begin to doubt her past, and Pablo (Maru's husband) discovers she's lying to him.

Maru and Mica realize that the only way to win Romero's favor is to form a new gang of young, beautiful black widows. They recruit Antonella, the hair salon employee, but they must find a second member.

After getting an extension to hand Romero over to Paola, Maru and Mica focus on training the new Black Widows. Although the training doesn't work, they decide to keep it that way. Meanwhile, the foundation members believe Maru isn't who she claims to be.

Maru and Mica infiltrate Gussi's widow's house and discover a secret that allows them to corner Paola. Maru reunites with her family. Mica and the young widows face a new obstacle that forces them to rethink their plan.

Mica goes out partying with Antonella and forges an unexpected bond with Romero's security guard. Following Maggie's accusations, Maru is forced to tell her mother the whole truth about the Gussi case.

Mica and Maru manage to put Romero to sleep, but their problems don't end there: now their lives are in more danger than ever. The girls discover that Gussi's death wasn't what they thought, so they follow a strange lead from Nelly to find out what really happened.

Kidnapped, Maru and Mica demand answers: why Paola helped plan the Gussi case and why she wanted to put Romero to sleep. Convinced they're going to die, Maru reveals her true feelings, and everyone's truths come to light.