Charlotte, adopted daughter of the Harrington family, is drugged and framed by her stepsister Isabella at her engagement banquet. Locked in a tower, she becomes entangled with William, heir of the Ashford family. Pregnant and cast out, Charlotte raises her son Leo alone for eight years. An alumni dance reunites them. William recognizes Charlotte by his mother's ruby pendant. Desperate for money, Charlotte works at his hotel, and they sign a three-month contract to fake a relationship. Spending time together, William discovers Leo shares his looks and peanut allergy — proof Leo is his son. Isabella keeps scheming, but her past crimes are exposed. Charlotte is finally recognized as a true Harrington. Leo recovers from surgery, the contract blossoms into real love, and the family of three is happily united.