Janet Smith (Gloria Talbott) and fiancé George Hastings (John Agar) arrive at the English manor house that Janet will inherit the next day, when she turns 21. They meet Mrs. Merchant (Martha Wentworth), the housekeeper; Jacob (John Dierkes), the groundskeeper; and Maggie (Molly McCard), Janet's personal maid. Oddly, Maggie is frightened and in a hurry to get home before the moon rises. Janet and George also meet Dr. Lomas (Arthur Shields), Janet's soon-to-be ex-guardian.