It tells the story of Elizabeth who married scientist Henry and moved into his mansion. Henry generously gave her money, jewelry, and fancy dinners, and everyone else treated her with respect, but she always had a lingering sense of unease. Henry assured Elizabeth that everything he had was hers, except for one locked room that she was not allowed to enter. After Henry went on a business trip, Elizabeth decided to find out the truth on her own and found that she might not be who she thought.