Lord Byron, the famous poet, is immortal, and in modern day he has become a music star. It comes to the attention of Duncan, Methos, and Joe that he is luring aspiring musicians into his world of drugs and reckless living, with the musicians usually winding up dead, and Duncan decides to put a stop to it. In flashback to 1816 Switzerland, Byron and Methos inspire Mary Shelley to write "Frankenstein". Written by
Did You Know?
The episode "The Modern Prometheus" suggests that Mary Shelly was inspired to write Frankenstien by seeing an immortal Lord Byron "die" in mid-battle and apparently be revived by The Quickening (becoming the lightning that famously animates her novel's creature). However, the method of lightning to reanimate dead tissue was invented for the films, not the novel. See more
Life, my friend, is in the details.