Where the Heart Lies

Viola Emrys was born with a strange pentagram birthmark resting directly over her heart. One Halloween night she ends up in front of her ancestor during the Victorian Era, Sebastian Emyrs, to find out he bears the same mark and she is his reincarnation. How can that be? And how is it connected to Ciel Phantomhive's butler, Sebastian Michealis? Full summary inside.