After years of leading an existence as a widower, country doctor Doctor Gibson decides to remarry, a decision that comes as a complete surprise to his naive daughter Molly. Soon after, Molly's existence is completely disrupted by the arrival of her stepmother and beautiful stepsister Cynthia.
Although Molly and Cynthia are completely different personalities, they immediately conceive a deep friendship for each other. However, their friendship is severely tested when they fall in love with the same man.
Things get even more complicated when it turns out that Cynthia is carrying a secret with her. A secret that has serious implications for both Molly and Sylvia.
Based on the novel of the same name (1866) by Elizabeth Gaskell.