Desc: Cero en conducta: Directed by Fyodor Otsep, José María Téllez. With Irasema Dilián, Leonor Maia, Virgilio Teixeira, Luis Arroyo. Alfredo Rivera and his cousin travel abroad from Buenos Aires to meet the sender of a mysterious letter. She happens to be a girl who has fallen in love with his name, used by her teacher as a fictitious recipient to practice commercial letters, her companions having sent one of the letters for fun.