Episode 1: Spring
Sir Simon de Canterville, a ghost haunting Canterville Chase, is humiliated when American billionaire Hiram Otis buys the estate. The Otis family, unfazed by his haunting, uncovers his dark past and treasure.
Episode 2: Summer
Sir Simon intensifies his haunting, but the Otis family remains unfazed. Challenged to host a cricket match, they face embarrassment. Meanwhile, the twins uncover Sir Simon's past and seek the treasure.
Episode 3: Autumn
Now the hunted, Sir Simon lurks around the house as Hiram's company crashes. Lucy, refusing to wallow, plans a Christmas Ball. Meanwhile, the twins discover a hidden map leading to the ghost's bones.
Episode 4: Winter
Virginia enters the fourth dimension to defend Sir Simon in court, while the twins explore a secret tunnel beneath Canterville Chase. Meanwhile, the adults launch a search for their missing children.