When Rebekah (Claire Holt) finds herself locked up in the sanatorium where she worked in 1919, she realizes a witch named Genevieve (guest star Elyse Levesque) is back to seek revenge and to reveal dark secrets that would destroy Rebekah if exposed. A distraught Elijah (Daniel Gillies) turns to Marcel (Charles Michael Davis) and Hayley (Phoebe Tonkin) for help when one of his decisions puts Klaus (Joseph Morgan) and Rebekah's lives in danger. With time working against them, Marcel realizes he may hold valuable information that could lead them to Rebekah and Klaus, but revealing it will almost certainly result in deadly consequences.
