Ana Piterbarg is an Argentinian director making her feature debut, and her producer and star is Viggo Mortensen, who spent his childhood in Buenos Aires and speaks Spanish. It is a strange film, and you have to let it grow on you: a drama with the premise of a high-concept thriller, but the drifting feel of arthouse realism. Mortensen plays identical twins: Agustín is a wealthy doctor in the city; Pedro is a loser who still lives in the remote Argentinian swampland of their childhood and is mixed up in shady business. Agustín is going through a crisis about his life choices and the existence he is locked into, and this is the moment Pedro chooses to pay his estranged brother a visit with the news that he has terminal cancer. The way the action begins is bizarre at first. This kind of movie traditionally has some arch black comedy to help you get over its contrivances; this has none, and you will need an extra effort of disbelief-suspension. The brothers have a strange quarrel about ownership of a book Horacio Quiroga's short-story collection Los Desterrados, or Exiles – and perhaps Quiroga's work has influenced this mysterious tale. It certainly doesn't bore.