In 19th century England, Count Cain C. Hargreaves is a beautiful yet sadistic young man surrounded by mystery. After inheriting his title, Cain's life seems to be surrounded in mystery and death. With only his man servant, Riff, to console him and confide in, and his little sister Merryweather to dote upon, Cain must solve mystery after mystery with the help of his immense collections of poisons and his wit.