Upon her arrival home, Soledad is still feeling the effects of the birthday cake she consumed at the party, leaving her family baffled by her strange behavior.

As Pilar tries unsuccessfully to convince her father regarding the pictures she wants to have taken, Soledad finally manages to let her guard down a bit with her new friend.

Pilar is determined to do whatever she wants, even if it goes against her mother's wishes. Meanwhile, Samuel and Soledad each seem to have met someone who challenges them... and may change the course of their lives.

As Samuel tries to convince Soledad to attend the student demonstration, Fabiola goes to the pharmacy looking for much more than her son's cough syrup.

While things couldn't be going better for Samuel in the Colombian Air Force, his brother Pedro continues with his old antics, much to his mother's chagrin.

Albeit tragic, the incident with the hamster has changed the dynamic between Kevin and his older brother Leo forever.

In the wake of the hamster incident, Kevin and Leo's relationship is strained, to say the least.

As Fede grows increasingly concerned for the health of Nico, the hamster at the center of his and Kevin's science project, Kevin's brother Leo's behavior becomes increasingly erratic.

As Leo begs his girlfriend to come over, Kevin is eager to wrap up his science experiment in spite of his partner Fede's reservations.

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.