狂鼠列车Avery is an unadventurous schoolteacher whose sister secretly signs her up for The Great Holiday Dash, a Christmas-themed reality competition show where she's paired with former hockey player Wes. Despite clashing at first, Avery's puzzle-solving skills and Wes' physical prowess help them excel as they travel from city to city and compete in festive feats that have a local flavor. It's not long before a real connection between these opposites begins to blossom. But when Avery overhears a conversation between Wes and a show producer it threatens to derail their budding romance. Keeping their eyes on the prize, the duo continues to dash to the finish line but there may be a more personal adventure for them still in store.