After suffering a season of loss, Monse enters the show's third instalment determined to keep her loved ones by her side. Her rocky romance with Cesar seems to find its wings, even after she drunkenly kisses Spooky during a fit of anger. With the threat of Cuchillos lingering in every episode, Monse also has to deal with her love life and the realisation that when Summer is over, she's off to the all-girls academy she applied to last season and leaving all of Freeridge behind.
Despite danger lurking around every corner, Monse gains solace in her flourishing friendship with Jasmine. It's just in the nick of time, since she needs all the friends she can get when she learns that her mother has died by suicide and her half-siblings want her at the funeral. Soon after that, the group realise the threat Cuchillos poses won't ever go away. They make plans to eliminate her, but Spooky's deal with 19th Street means they don't have to go through with it.
Free of all the drama that's been culminating since season one, Monse is sent off to school with a farewell party consisting of the whole gang, including Jasmine. Jasmine gifts her with a photo of the two friends, and Monse swears she'll always keep it in sight to remember her family. But in the season's time jump two years in the future, we see a lively Monse in her dorm with a new group of friends as the photo of the Freeridge gang collects dust in a corner.