When Kevin's parents go out and his sister neglects her babysitting duties, the tension between Kevin and his brother, Leo, comes to a head over Kevin and Fede's science project. Will their hamster survive? Will Fede and Kevin?

The power struggle between Kevin and Leo continues as their parents attempt to go out for the evening, leaving their sister in charge.

As Kevin and Fede struggle to come up with the specifics of their science project, Kevin's older brother Leo is determined to interfere at every turn.

The time has come to present their natural science project in front of their class, and Kevin and Fede have yet to even begin.

During some sleepless nights, Kevin contemplates the complexity of the universe— as well as his relationship with his brother.

After ditching his accordion recital to play soccer, Kevin must face his father.

In the conclusion to her interview with the team at the radio show Tu Voz Estéreo [Your Stereo Voice], in the wake of some tragic events involving her friend Mariana and Mariana's boyfriend's mentally disturbed mother, Paola offers an update as to the fates of both.

In order to keep his spot on the soccer team, Kevin must quit his accordion lessons and simultaneously risk disappointing his father. What will he decide?

As Doris flees from the police, they enter her home to find a wounded Mariana and a chemical stench in the air.

Can Kevin pawn his accordion off on his brother Leo before he's forced to perform in public?

Doris discovers that the police are outside her home and attempts to flee with her son.

Although the accordion is definitely not Kevin's cup of tea, he is terrified of quitting for fear of letting his father down.

Disaster seems imminent in the González household as tensions arise between Kevin's father and grandma.

When the police finally arrive, a hysterical Paola implores them to enter the home of Doris and her son Sebastián as soon as possible to find out what has happened to her best friend Mariana.

Kevin has won his father over by telling him he shares his love for vallenato music. Unfortunately, however, it isn't true, and now he must deal with some unexpected consequences.