On the day Enola Holmes turned 14 her mother disappeared. Desperate, Enola wrote to her famous older brothers Sherlock and Mycroft asking them to help find her. The brothers are sure everything is for the best -- her mother ran away and took a large sum of money with her. Enola doesn't believe them and begins her own investigation, leading her to London, where her own detecting adventures await. She is involved in the disappearnace of a young marquess ... can she find the missing boy and hide from her brothers while searching for her mother?