A magna cum laude graduate of UCLA, Cassandra Harte never took a test she couldn't ace. So when her home pregnancy test comes back negative, she's certain the kit's defective. Failure has never been an option for Cassandra. She has a well-established career, a handsome husband (Nick), and a lovely home. But there's one thing Cassandra desperately wants that she doesn't have: A baby. After trying for months to get pregnant without success, she starts to wonder if she's finally met a challenge she cannot conquer. Determined to conceive, she creates an ovulation calendar so she can seize that perfect 24-hour window. When that fails, she sends up fervent prayers. But it soon becomes apparent that her inability to become pregnant has nothing to do with timing or faith, and everything to do with Renee, her diabolical, thirteen-year-old stepdaughter.