This time, the Brigada Z gang, take a little vacation in Mar del Plata but their money is stolen. In order to enjoy their vacation, they become lifeguards and accidentally discover a band of thieves that robs Casinos. Emilio, Gino, Berugo and Alberto don't forget they're cops so they decide to investigate.
Alberto, an employee of a car dealership, is commissioned by his boss to deliver a car that has been sold to a customer. Being a luxury car, he has no better idea than to invent an excuse to the new owner of the vehicle, delay delivery for the next day and use it to go out to have fun at night with his faithful friend Jorge. They both go to a revue theatre and, while witnessing the performance, the first vedette (Corina) faints. Then Alberto and Jorge pose as doctors, in order to meet Corina. As is to be expected, both decide to continue the deception with the passing of the days, causing the confusion to become bigger and bigger and harder to keep secret.
Pepe receives a notebook from his great-uncle containing the formula for making an atomic bomb. When some specialists dedicated to science discover it, they begin to send people to steal it.
The vicissitudes of six different couples who arrive at a hostel in Buenos Aires called La Cigarra and are quarantined because of a supposed bubonic plague, causing all kinds of inconveniences and entanglements as a result of this forced coexistence.
