Nuneaton, 1850
Growing up on a canal boat has meant life for young Saffie Doyle has been hard. Her mother, Olivia, was cast out by her well-to-do family when she fell in love with Saffie's father, a lowly boatman named Reuben. But as the years have passed, Reuben has become a bitter and cruel drunk, forced to work for the local crook, Seth Black, to keep their family afloat.
Saffie always dreamed of becoming a teacher, despite her father's insistence that she had no need to read and write. Keen to nurture her ambitions, Olivia hoped to introduce Saffie to a childhood friend - the kindly and wealthy Marcus - who runs a free school for the local children, but when Olivia falls ill, she's unable to.