Alexander Grayson becomes drawn to a woman who looks like his dead former love, while her fiance, Harker, worries about his ability to give her the life she deserves.

Grayson and Lady Jayne become lovers as he looks into her connections; Grayson helps Mina face a challenge; Jonathan strikes a bargain that has unexpected consequences.

Grayson investigates whether Lady Jayne is a vampire hunter; Lucy employs absinthe, romance and a tour of London to mend Nina's broken heart; Grayson earns a powerful enemy.