Xena and Xander Holmes, an American brother and sister living in London for a year, discover that Sherlock Holmes was their great-great-great grandfather when they are inducted into the Society for the Preservation of Famous Detectives and given his unsolved casebook, from which they attempt to solve the case of a famous missing painting.

In the eleventh century the teenage princess Anna Comnena fights for her birthright, the throne to the Byzantine Empire, which she fears will be taken from her by her younger brother John because he is a boy.

Introduces the history, culture, and people of ancient Greece and examines its many contributions to the development of Western society.