Heather Shaw, a fitness instructor, doesn't fall in love. With her six-week rule, she ends her relationships before they get too serious. With Christmas on the horizon, she can't wait to enjoy her small hometown's traditions, including helping her mother with the Christmas fair. All of that changes when she runs into Allen—literally.

Allen Richards is new to the small town of Maple Meadow. He's not big on Christmas, not since he lost his mother during the holidays two years prior. All he wants is a fresh start since his divorce, work his job as a physical therapist, and take care of his father. Heather's not in his plans.

When a freak accident leaves Heather with a knee injury, the one man who makes her heart pound is her physical therapist. Heather should stay away. Love never works out for her, but more than mistletoe draws these two opposites together. Then the past threatens to tear Allen and Heather apart, and hearts are on the line this Christmas.