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.

Grayson tries to win Lady Jayne's heart; Lucy hides her broken heart behind planning Mina and Harker's engagement party; Grayson's reunion with an old friend complicates matters; Van Helsing suffers a setback.

Harker learns Gen. Shaw isn't the hero he pretends to be; Van Helsing's first test with the solar serum is a failure; Davenport's people abduct Renfield; when Grayson dances with Mina at her engagement party, their feelings are revealed.

Browning hosts a board meeting in the sunlight in an effort to expose Grayson; Grayson and Van Helsing acquire a vital component for the wireless electricity technology; Mina and Harker advance their relationship.