The story is about a young man of the landed gentry and a Tory during the American revolution...
"Thinking me dead, my poor family had buried me, but it was not my lot to remain in the ground, for the legacy hidden in my blood soon expelled my reanimated body from that early and unfair grave.
Asleep during the day, abroad during the night and able to command some useful if alarming new talents, I had no name for this change nor did I know whether it was a curse or a miracle, though the latter seemed most likely, once the shock of my resurrection had been overcome."
Infected by his first lover while at University in England he dies in the revolution only to be resurrected much to his shock. The vampire attributes are classic ones and get him out of many close calls with rogues of the period. Not prone to violence the gentleman is devastated when he finally does kill but gradually learns to use his talents in as moral ways as circumstances in an unjust world allow.
If there's such a thing as Vampire Light this would fall into that category. Not erotica like Rice nor as violent as Yarbro but equally skilled in historical depiction and dialect. More like historical romanticism with vampire adventures.