Catalina is excited to find out a new student, Esmeralda, has joined her third-grade class at Valle Grande Elementary School. But despite Catalina's attempts to introduce herself, Esme won't talk to anyone but her own cousin, Jazmín. Could Jazmín be keeping Esme from making new friends? According to Catalina's frenemy Pablo, it's just like what happened to the secret princess in the telenovela hit The Hidden Crown! With Tía Abuela's magical sewing kit, Catalina sets out to create a disguise to unravel the mystery.