Go Hye Rim (Han Ye Seul) is a fortuneteller known as “Madame Antoine” due to her supposed spiritually connection to Marie Antoinette. She uses her intelligence and keen sense to read her clientele. When Choi Soo Hyun (Sung Joon), an expert psychologist, opens his clinic upstairs, they clash instantly. Partially out of petty revenge, he chooses to enlist her in his psychological experiment to prove that love does not exist. As part of the experiment, he and two other men will woo Hye Rim. But what will happen as he begins to fall in love for real? And will she ever be able to believe in him again when the truth of this experiment is revealed?