The film presents the five members of the popular music group La Pandilla in a tangled comedy-musical plot, involving a stolen audio recording, during the summer of their group tour. Includes sequences within the same concerts, where the enthusiastic public is also shown. The plot is woven around this tour, alternating performances with funny incidents at a hotel in Condado where they stayed.

Filmed at the Hotel El Conquistador in Fajardo, Puerto Rico, the film presents the musical group La Pandilla in a plot based on espionage.

When spirited governess Karina arrives at a grand mansion to teach a group of musically gifted children, she brings harmony through song—but discord brews behind the scenes. As Spain’s top star Marta prepares for Eurovision glory, her composer boyfriend Carlos finds unexpected inspiration in Karina. Jealousy, ambition, and romance collide when Marta issues a dramatic ultimatum: either Karina leaves, or Spain loses its voice at Eurovision.