Sherlock Holmes receives an urgent request for help and advice from a former acquaintance of Dr. Watson’s, who, having recently returned from an extended business-related stay in Peru (from where he has also imported his new wife) has recently been shocked into believing he has married a vampire, upon finding his wife sucking the neck of their newborn son – with a pinprick mark on the baby’s neck and traces of fresh blood on his wife’s lips providing seemingly undeniable evidence as to the lady’s actions. Sherlock Holmes, of course, derides the belief in vampires as “pure lunacy,” insists that “[t]his agency stands flat-footed upon the ground, and there it must remain. The world is big enough for us. No ghosts need apply” – and proceeds too demonstrate, applying his trademark reasoning, that there is a perfectly logical (though rather tragic) explanation for the things that his client has witnessed.
Review of the screen adaptation starring Jeremy Brett HERE.