Delilah's life gets turned upside down by the disappearance of her mother. Her father and her move to New York City to live with her uncle and his family, and she discovers that her family are secretly spies. To find her mother, she must train hard on her missions, fight crime, and even uncover the whole truth of The Darnelle Organization. With obstacles thrown in her path at every turn, how will Delilah get any work done?