Dr. Julia Hoffman promises Barnabas that his secret is safe if he will allow her to conduct experiments to cure him of his vampirism. Jealous of Victoria Winters’ engagement to Burke Devlin, Barnabas plans revenge against Burke, who becomes suspicious of Barnabas and begins to investigate him. While trying to hide from Barnabas, David Collins becomes trapped in the secret room of the Collins Mausoleum. The frightened boy pleads with the ghost of Sarah Collins to rescue him. Barnabas realizes that David may hold the key to finding his late sister’s spirit.
After telling a stunned Barnabas she believes she can cure him, Julia reveals she is treating Maggie, who is hidden away.
Sarah informs David that Maggie is still alive. Victoria finds Sarah’s cap on the floor.
Victoria tells Burke about an old house she has fallen in love with. Burke and Barnabas pry into each other’s past.
Sarah helps Maggie escape from Windcliff. Barnabas, Victoria and Burke explore the house called Seaview.
Maggie’s memory returns, but Julia quickly hypnotizes her before she can say anything damaging about Barnabas.
Unconvinced that Maggie is unable to remember the identity of her kidnapper, Barnabas plans to kill her.
Maggie tells Barnabas about her visit from Sarah. Later, Barnabas tries to kill Maggie and hears Sarah.
Burke asks Elizabeth to sell Seaview to him. Maggie’s memory of what happened to her begins to return.
Julia warns Barnabas to stay away from Victoria. Barnabas learns of Victoria’s romantic interest in Burke.
Victoria dreams that someone entered her bedroom during the night. Barnabas is alarmed that Victoria may marry Burke.
Barnabas and Burke compare their competition for Victoria to a game. Barnabas believes the stakes may be life or death.
Intent on preventing the marriage of Victoria and Burke, Barnabas is eager for Julia to finish the treatments to cure him.
Burke’s suspicions of Barnabas continue to grow after he questions Dr. Woodard and Maggie.
Julia and David go in search of Sarah. A concerned Burke asks Victoria to stay away from Barnabas.
Barnabas feels Julia’s treatments are weakening him. Sarah shows David the secret room in the mausoleum.
Barnabas informs Victoria that Burke is having him investigated. Victoria assures Barnabas she will come to his defense.
Victoria warns Burke that she will end their engagement if he does not stop his investigation of Barnabas.
Sam angrily accuses Julia of lying. In her bedroom, Maggie discovers Sarah’s doll has been left behind.
Julia tells Barnabas that Sarah has been to the Old House. He’s convinced Sarah will eventually appear to him.
While he’s searching for Sarah in the mausoleum secret room, David hides when Barnabas and Willie arrive.
David is trapped in the secret room of the mausoleum. Barnabas comforts Victoria, who is distraught over David’s disappearance.
Barnabas is disturbed to learn that David has been looking for Sarah. He tells Willie they must find David before anyone else.
Roger returns from Boston and joins Joe in the search for David. The cemetery caretaker warns them that the dead are restless and will take revenge.
Sarah appears to Willie. Dr. Woodard says an expert claims that Sarah’s doll is over one-hundred and fifty years old.
Sarah appears inside the mausoleum secret room to David, who is terrified when he runs into the arms of Barnabas outside.
After Burke rescues David from Barnabas, David feels someone evil is watching him at Collinwood.
Barnabas is convinced that David knows his secret. While searching the mausoleum, Sam and Joe realize Sarah is a ghost.
Dr. Woodard takes Maggie out of Julia’s care. Barnabas prepares to kill David but is stopped by the evidence of Sarah’s presence.
Hoping to trap her kidnapper, Dr. Woodard decides to pretend publicly that Maggie’s memory is returning.
David confides his fear of Barnabas to Burke. Barnabas disbelieves Julia’s assurances that Maggie’s memory is still gone.
Sarah appears to Maggie but suddenly vanishes. Sam assures Maggie that she is being protected by policemen outside their cottage.
Willie agonizes over his helplessness, knowing he is unable to warn Maggie about Barnabas’ plan to kill her.
At the hospital, Willie lies in a coma. Everyone finds it difficult to accept that Willie could have been Maggie’s kidnapper.
David refuses to tell Victoria what has upset him. But he insists that Willie is innocent of kidnapping Maggie.
After Barnabas talks to him, David is more frightened than ever. In a dream, Sarah reveals a terrifying secret to David.
While Willie clings to life, Julia attempts to hypnotize David to stop his prying into Barnabas’ affairs.
While talking to Sarah, David realizes there is a coffin the Old House basement, but Sarah warns him to stay away.
Barnabas hides Maggie’s ring in Willie’s room, hoping Sheriff Patterson will find it.
When Willie awakens, the sheriff questions him. Later, the sheriff tells Barnabas that Willie’s mind is completely gone.
David finds the Old House basement door is locked. After Julia sends him home, David is attacked by a giant bat.