In 1920s Buenos Aires, a city shaped by European immigration, a family of rats peacefully roams Plaza de Mayo, sustained by a kind-hearted baker who shares his empanadas with them. However, the governor, repulsed by the rodents, travels to Paris and discovers skilled hunting pigeons. Upon returning, despite witnessing the harmony between the baker and the rats, he releases the French pigeons in the plaza. With the new predators patrolling their home, the rats are forced to abandon the plaza and seek refuge in the sewers. But to the governor’s surprise, the pigeons become a plague.