Bell has a problem. She's a Manx kitten cursed with a TAIL. Knowing her family is ashamed of her appearance and scared of this terrible curse, she leaves the warmth of the large Victorian home to find a place where her curse won't be noticed. Determined to prove she can fit in, she begins her new life on a train with a conductor named Henry. Then meets an unlikely partner, a hound called Watson, belonging to a Pinkerton detective. Together, Bell and Watson set out to catch a thief. Will the pair succeed, or will Bell again be a source of disappointment to those she cares for?