ðə dˈɑːktɚ tɹˈævəlz tə ðə jˈɪɹ wˈʌn θˈaʊzənd fˈoːɹhˈʌndɹɪd ˈeɪɾi fˈaɪv, tʊ ɪnvˈɛstᵻɡˌeɪt ðə mˈɪstɚɹi ʌvðə pɹˈɪnsᵻz ɪnðə tˈaʊɚ, ɪn ˈɔːɹdɚ tə fʊlfˈɪl ɐ kˈɑːntɹækt tə ɹˈaɪt ɐ sˈɪɹiz ʌv tʃˈɪldɹənz bˈʊks.
The Doctor travels to the year 1485, to investigate the mystery of the Princes in the Tower, in order to fulfil a contract to write a series of children's books.