An anonymous person seeks vengeance on behalf of Luis. Sofía must solve the first mystery in order to save two classmates before it's too late.

When a certain someone returns to school, chaos breaks out. Natalia rushes to solve her financial dilemma. The search for the avenger heats up.

Sofia and Javi try to predict what the avenger will do when Rosita insists on hosting a party at her house. Gerry feels cooped up at Raul's place.

Natalia's account of what transpired the night before sparks an argument between Javi and Sofia. Pablo struggles with the news about María.

Raul and Sofia try to find Gerry before the avenger gets to him. Desperate to raise money, Natalia tries an unorthodox dating app.

On the day of Quintanilla's goodbye ceremony, Sofia and Raul race to discern who the next victim will be. María attempts to help Natalia.

Sofía studies Luis' drawings to work out who the avenger is targeting next. Natalia and María accept an invitation. Rosita doesn't heed a warning.

Multiple people's lives are put in danger when the avenger makes a final desperate move, leading to devastating consequences.