Excellent Spanish thriller that takes two seemingly separate story strands and sends them hurtling towards each other with predictably shocking, tragic consequences. In the Spanish countryside on the eve of the civil war, a group of children who can feel no pain are confined to an asylum after being deemed a danger to themselves and each other. A rogue German doctor attempts to cure the children by teaching them human suffering, only to find his endeavours take a wildly different turn. Meanwhile in the present day, a revered surgeon discovers he is in desperate need of a bone marrow transplant after a widowing car accident. This tragic incident proves just the triger for a spiralling descent into darkness as he goes in search of his parents. Part Denis Villeneuve’s Incendies, part del Toro’s The Devil’s Backbone, Juan Carlos Medina’s incredibly atmospheric thriller proves an engrossing and horrifying experience.