The heroine, Sarah Bennett, is pregnant and preparing for childbirth when she's unexpectedly diagnosed with terminal cancer. Knowing her time is limited, she resolutely gives up treatment in order to protect what she believes is her infertile husband's only child. But by chance, Sarah discovers a devastating truth—her husband's entire family secretly despises her, and he had long ago switched her IVF sample. The child she's carrying isn't hers and her husband's, but his mistress's. They're just waiting for her to die, so the mistress can take her place. Shattered by the betrayal, Sarah awakens to the truth and decides to take revenge on her husband's family before her time runs out.
