Set in the town of Inveranoch, Scotland in 1912, the story centers around Andrew MacDhui (Patrick McGoohan) a coldly-scientific, atheist veterinarian, his seven year old daughter Mary (Karen Dotrice), and her cat Thomasina (voiced by Elspeth March). Thomasina the cat narrates the movie. (Thomasina was originally called "Thomas" by her adoptive family. She explains that they amended her name "after they... well... got to know me better.") MacDhui prays for the first time in four years that God will somehow cure his daughter.