Montserrat is a girl who lives with her wealthy parents who adore her and Juan José, her boyfriend, loves her very much. Ingrid envies everything that makes her cousin Montserrat happy and decides to destroy her love with Juan José.

Montserrat Linares and Juan Jose Alvarez will have to overcome adversities and obstacles that get in their way in order to live "Under the Reins of Love". Montserrat was part of the University horse-riding team and her cousin Ingrid was always jealous of her. She had it all and Ingrid wanted everything that was part of Montserrat's life, including her boyfriends.