Crystal Margaret "Christie" Hope is the youngest member of her noble family. While her parents are abroad in India, Christie is expected to keep up with her education in England. But instead of rigid studying, Christie prefers to spend time with her companions: maids Annmarie Hopkins and Nora, her dog Nelson, and governess Grace Amelia Dunbar. While Christie studies at her own pace in her personal library, she actively avoids tutoring sessions by sneaking off to a special place—her uncle's residence at 221B Baker Street.

Sherlock Holmes is a renowned detective in London who regularly keeps himself busy with intriguing cases. His companion, Dr. John H. Watson, is usually all the assistance he needs, but sometimes he finds himself giving his niece's intelligence a chance to shine.

[Written by MAL Rewrite]