Vibrant and headstrong, Ally Pearce loves working on the Edith, her family's narrowboat, proving she's the equal of any man on the Leeds to Liverpool canal. Betsy, delicate, calculating and sensuously beautiful, wants only to become a 'lady' - and will use the most unladylike means to become one. When Dr Tom Hartley enters the sisters' lives after a tragic accident both are attracted to him - but for very different reasons...