Good story ....

... But nothing new and predictable. Rätzels the solution is not a big Üerraschung and the end not quite realistic, even in Argentina there are laws. Therefore, 3 points ("not bad").
However, I must add because it is Ricardo Darin, because it is my town where I grew up and because it's my language a extra point. Thus, most readers will be able to do anything here, what I understand, but it's my opinion.