Hailey has more work than she planned on during the orchestra's Latin American tour. When a stolen violin threatens the tour's final concert in front of Rodrigo's former maestro and a potential major donor, Rodrigo has to call in an old friend. An adventure through Mexico City's underworld ensues.

Rodrigo shows Hailey HIS Mexico and takes her to a performance of his childhood youth orchestra. Thomas and Gloria meet with Juan Luis Delgado, the richest man in Mexico. Cynthia gets a surprise visitor and ends up in an unexpected position. Maestro Rivera, Rodrigo's mentor, asks him to fulfill a promise.