Betty Ward recovers from the tragic news of her twin sister's death only to receive a far greater shock. She asks her sister's husband, Jeremy Frene, if she may visit Georgette's grave, and is horrified when she learns that Georgette was never properly buried. Instead, Jeremy had her body placed in a crystal coffin which he keeps in a locked attic. This way, he explains, Georgette's ghost is free to return every night.

Betty is convinced that Jeremy is insane. She suspects foul play behind Georgette's sudden death, and believes the secret may be locked in the strange glass coffin with her twin's perfectly embalmed body.

Betty seeks out Barnabas Collins' help, never guessing that in doing so, she has endangered her own life, too!