Everything is set in a bar called "La Oficina" which is located on a street in Madrid called "San Esteban de Pravia, number 12" (curiously it has the same name as the town where the director of the series was born). The bar is dominated by the "Pruden" (Anabel Alonso) and her husband the "Smith" (Antonio Resines), and there they usually gather a group of thieves, all captained by "Don Anselmo" (Fernando Fernán Gómez), and veterans "Escabeche" (José Luis López Vázquez) and "Anticuario" (Manuel Alexandre). These three friends, who remember timos and plan new, are closely watched by the clums but bonachón "Comisario García" (Agustin González) and his assistant, the "Inspector Gutiérrez" (Roberto Cairo).