Lara and Ben were once high school sweethearts who broke up due to personal differences. After years of not seeing each other, they bump into each other while doing Christmas charity work. Intrigued by the coincidence, they start to talk and reminisce about the good old days. While volunteering, they find out about the Christmas contest, which is hosted by a local TV network, to win a considerable sum of money for a charity.
Being passionate about helping those in need, they both decide to enter the competition. The contest requires them to compete in various Christmas-themed challenges, such as decorating Christmas trees, wrapping gifts, and creating gingerbread houses. The tasks prove to be much harder than they had anticipated, and they soon find out that winning isn't going to be easy.
As the competition goes on, the two exes rekindle their relationship, but they remain focused on the competition nonetheless. The city is taken aback by the chemistry between the two, and the media starts to cover their story instead of the competition itself. The two become the talk of the city, and everyone is rooting for them to not just win but rekindle their romance.
Their families and friends also wish for the two to get back together, but they are determined to win the contest for their chosen charities. The competition comes to its final round, and Lara and Ben compete against each other for the last time. This time, the challenge is to sing a Christmas carol, and the winner is chosen by the audience's votes.
Lara and Ben both give their all, but only one can win. The crowd announces the winner, and it turns out to be Lara. However, in a change of heart, she refuses to accept the prize, stating that the real winner is the charity that Ben was competing for.
The two have made a lasting impact on their city, and their act of kindness has inspired the community to engage in more charity work. The movie ends with the two rekindling their romance and everyone realizing that it's not about winning, but love and humanity.