What is the overall conflict of this novel? ?what type?(manVSman etc) and how does it drive the plot

The general conflict in a detective story like Sherlock Holmes is man vs man. Holmes and Watson are introduced to the case by Dr. Mortimer, a friend of Sir Charles Baskerville. Mortimer believes that a hound has in fact killed Sir Charles, because he found a paw print near Sir Charles's corpse. He is worried that there may be some truth to the superstitious legend, which is detailed in an old manuscript, and thus approaches Holmes in hopes that the detective can protect Sir Henry, who is soon to arrive to claim the family estate and fortune.