Don't let the genres of "mystery" and "thriller" fool you. There are NO thrills here, just interminable boredom. It runs 1 hour 20 minutes, but it feels like 4 hours because nothing happens. We get to listen to someone's boring, pointless phone call to their mother, which goes on and on and on for no apparent reason other than to pad the running time. A terrible, terrible movie which should be an embarrassment to all involved.