Death on a quiet day

Student David Henchman decides to spend a quiet day in the country to escape from his boisterous classmate tormentors but gets more than he bargains for when he comes across a man with a bullet hole in his head. So begins a tale of frenzied pursuit featuring a disappearing corpse, a mad race from a killer on the moors, a panicky girl, a flight by automobile, and an ivy-covered tower that contains the secret of death on a quiet day.