Such a Nice Girl

The morning after a glamorous, luxury wedding, you and your best friend go to wake your twenty-four-year-old daughters. You open the door to their shared room in the pool-house and find a lamp smashed on the floor, a blood stain on the carpet, a ringing phone - and both girls are nowhere to be seen. The police come and you discover something shocking. Something inexplicable. Is one of your daughters trying to kill the other?