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Businessman Marcos Parra and reporter Érika Treviño witness a dark discovery on the San Pedro border that changes their lives.

The wave of violence in Monterrey claims the lives of two women and Marcos denounces the mayor's ties to the Los Razos criminal group.

Marcos prepares his candidacy while Abraham Rocha invites Adrián to participate in Tania Gastélum's political campaign. Roberta is in danger.

Marcos visits the boss of Los del Desierto and tells him about his candidacy for mayor and his plan to keep San Pedro safe. Erika is kidnapped and given a lesson. Gabriel Maldonado adopts a new and dangerous "lifestyle."

On the eve of the elections, threats against Marcos appear. Guadalupe agrees to be his ally and the paramilitary group Los Muchachos is born. An audio that puts Marcos in a compromising position is released.

Los Muchachos kidnap los Razos' leader while Marcos asks Yuri Sánchez to solve a complicated mission in which he will find an unexpected ally in Érika.

Marcos faces an insecurity problem in San Pedro, pressure from Sofía Santos for changing the name of a street, and complaints from the community over a school issue. Furthermore, Yuri questions him about the death of his adversaries.