In Christmas at the Drive-In, Sadie returns to her hometown and moves in with her grandmother. While there, she reconnects with her high school sweetheart, Ben, who now runs the local drive-in theater. When an opportunity arises to save the struggling drive-in from being sold to a developer, Sadie and Ben team up to put on a Christmas movie marathon fundraiser. As they work together, old feelings resurface and they must decide whether to give love a second chance. Along the way, Sadie also finds new purpose and fulfillment in her life as she helps to save a beloved community landmark.