Bloodless

An ordinary bus carries 5 young couples to an ancient castle tucked away in an unnamed locale. They have answered an advertisement seeking participants for a 30-day medical trial. The company conducting the experiment, led by the co-ordinator, explains there will be no contact with the outside world. The group are free to leave at any time, but if they do, they will forfeit their fee: £20,000 per couple. Mysterious, unexplained events occur around the castle and strange noises are heard in the middle of the night. At first the group are skeptical; they think the company is creating the illusion of a 'haunting' to test their reactions, until it is revealed there is something more sinister involved.