Oxford, 1862. Poor, plain Mary Prickett takes up her post as governess to the daughters of the Dean of Christ Church. When Mary meets Charles Dodgson, a friend of the family, she is flattered by his attentions and becomes convinced he plans to propose marriage. But it is also clear that he is drawn to the little girls in Mary's care, and on a boating trip one sunny day Mr Dodgson tells the story of Alice's Adventures in Wonderland a curious tale about the precocious Alice Liddell

As Mary waits for her life to change, she becomes increasingly suspicious of Alice's friendship with Mr Dodgson. Before long, everything Mary believes is turned topsy-turvy, and her determination to get to the truth will have lasting consequences for all involved...