Months before a brutal massacre in a Bogotá restaurant, two outsiders meet over some missing library books, and discover a joint interest in crime.

The two unlikely friends form a crime club together. León needs Jeremías' help in solving a mystery, and is accused of suspicious activity of his own.

León misses a lecture and attends an eventful party. In the days after the massacre, both he and Indira do some digging into the closed case.

Jeremías and León take a fateful hike in the mountains. Weeks later, police arrive at the student's door, requiring quick thinking from Indira.

After the horror of his hike, León continues to spiral. Jeremías' mother wants to celebrate a promotion, but her well-planned dinner ends in disaster.

Jeremías offers an invitation — and sees an unexpected face at his regular restaurant. As his memories start to return, León goes to confront his past.

Indira begins to have doubts about León. Jeremías argues with his friend, but it's a word from his mother that finally pushes him over the edge.

Jeremías dines at San Marzino for the final time. León returns to the mountains, desperate to recover a victim — and his memory — before it's too late.