Capulina es barrendero en un banco y sueña con ser policía. Por casualidad, frustra un asalto y un secuestro, y ahora es el nuevo policía del banco.

The story of the coolest, street-smart hustler ever to walk the streets of Mexico City, based on the international hit song. The police are after him, his rivals are after him, and all the while the most beautiful women of Mexico are in the cup of his hand.