Out of the blue, a meek, old painter begins receiving love letters from Rosaura. This intrigues his fellow boarding house tenants, so they involve themselves into his relationship until one day the mysterious Rosaura appears.
A murderer terrorizes the city of Buenos Aires by attacking on the streets on rainy days and always leaving a card with the name "S. López". A local boarding house full of eccentrics appears to house a possible suspect.
