13Hrs, also known as Night Wolf, is a 2010 British horror film directed by Jonathan Glendening. The film stars Isabella Calthorpe, Gemma Atkinson, John Lynch, Josh Bowman, Antony De Liseo and Tom Felton.

Plot

After spending a few years in Los Angeles, Sarah Tyler (Isabella Calthorpe) returns to her home in England. She arrives to find her brothers having a party in the barn, among which are Stephen Moore (Peter Gadiot), his girlfriend Emily (Gemma Atkinson), Charlie Moore (Gabriel Thomson), Gary Ashby (Tom Felton), Doug Walker (Joshua Bowman), their youngest brother Luke Moore (Antony De Liseo) and their dog, Stoner. Luke tells Sarah about their parents' arguments over bills, and their mother's supposed love affair. When Sarah inquires about this, Stephen reveals that her stepfather has accused her mother of having an affair with a man to whom she is paying large sums of money.