When young Frank Conway returns to his hotel on the edge of the South Downs one evening in a distracted frame of mind, none of the other denizens of the Fernbank think much of it. His request for an audience with various people are rejected in the rush for dinner and when, over that same meal, Conway dies in an agonising and protracted manner, many of the people present begin to regret their thoughtlessness. Conway’s final movements then fall under the remit of local man Inspector Baines, and, with the dead man’s sister also in attendance, two parallel investigations are run…but which will bear fruit first? And how does the sighting of a ghastly half man, half monster on the Downs tie into events?