A woman in Wales has her mind destroyed by a scientist's attempt to enable her to see the god of nature Pan. Years later, a young woman named Helen Vaughan arrives on the London social scene, disturbing many young men and causing some to commit suicide; it transpires that she is the monstrous offspring of the god Pan and the woman in the experiment.
Occupied all day in pursuits both serious and lucrative, the temptation to relax in the evening was too great, especially in the winter months, when the fire cast a warm glow over his snug bachelor apartment, and a bottle of some choice claret stood ready by his elbow.