As Magdalena's (Emily Rios) 15th birthday approaches, her working class family prepares for the all-important Quinceañera - a lavish coming-of-age celebration. To help with expenses, Magdalena is forced to wear a hand-me-down party dress and abandon her dream of arriving in a Hummer limousine. But when her father discovers she's pregnant and refuses to believe the incredible truth - she's actually still a virgin - Magdalena moves in with her elderly Uncle Tomas (Chalo Gonzalez) and black sheep cousin Carlos (Jesse Garcia). Her newfound family is soon put to the test, however, when an unexpected crisis threatens to tear them apart, and Magdalena learns what it truly means to come of age.