Miranda must balance her new identity as a Whitcomb with the family's desire to keep her father's past affair—and her existence—private to protect his reputation.

Just days before the wedding, a mysterious man named Charles (Bill Dow) arrives, claiming to be Miranda's long-lost uncle. Miranda is skeptical because her mother never mentioned a brother, leading to tension and a final search for the truth about her mother’s past.

The couple faces the heartwarming pressure of writing their own vows and planning a "storybook" ceremony in a snow-covered town complete with horse-drawn carriages.