Short but chilling!  The shots and cinematography gives nary a hint that this is  a kind of thriller film except maybe for that scene where  the expressionless  daughter is sitting in  the sala,  watching TV.  That scene in the kitchen though, where  the chains in the wife's  feet were exposed and  that HELP sign  in the window  leads you to the shocking truth, once and for all!  Brief but spot-on  in conveying its message.  Do check it out!