Having been dumped for the 19th time by a girl named Katherine, recent high school graduate Colin sets off on a road trip with his best friend to find some new direction in life while also trying to create a mathematical formula to explain his relationship failures.
It was meant to be a harmless stag night prank. A few hours later four of his best friends are dead and Michael Harrison has disappeared. With only three days to the wedding, Detective Superintendent Grace - a man haunted by the shadow of his own missing wife - is contacted by Michael's beautiful, distraught fiancée, Ashley Harper. Grace discovers that the one man who ought to know Michael Harrison's whereabouts...