Laurel McCullough is in desperate need of help. Her beloved grandmother has just been diagnosed with Alzheimer's and the baby she and her husband, Zach, have longed for, now seems like an impossible dream. So when Mrs Miracle appears at her door searching for work, Laurel couldn't be more relieved. She invites the nurse into her life and it's not long before they form a beautiful friendship. As her grandmother's condition seems to improve, and Laurel and Zach continue their desperate quest for a child, Laurel soon realises that there appears to be more to Mrs. Miracle than meets the eye.