On a hot summer day in 1923 a young housemaid stumbles upon the gruesome remnants of a tragic double homicide. As the years pass, several other unexplained deaths take place in the seemingly haunted upstairs bedrooms of the stately beach house known as 'Cliff's End'. Finally abandoned by its owners, Cliff's End sits deserted for more than half a century until an American teacher on a tour of Europe decides to buy the old place. Uninvited Guests tells the story of Kevin Grinelle who, enchanted by the derelict cottage overlooking the craggy, windswept seacoast of southern England and charmed by the eccentric villagers of Porthallow, decides on a whim to purchase the house. A chance meeting with a handsome neighbor leads to a long overdue reexamination of his sexuality at the same time that the increasingly sinister late night disturbances at Cliff's End send the young expatriate on a desperate search for the truth about that terrible night in the summer of 1923.