In Valentine in the Vineyard, Frankie and Nate are both passionate about their work at their family-owned winery. While Frankie is more traditional in her winemaking methods, Nate is more experimental and always looking for new ways to innovate. Despite their differences, they have a strong connection and are excited to start their life together.
However, their plans are thrown into disarray when Lexi and Marco announce their engagement. Frankie and Nate are happy for their relatives, but they also struggle with the timing of the wedding. Valentine's Day is one of the busiest times of year at the winery, and hosting a wedding would be a huge undertaking.
Still, Frankie and Nate want to support Lexi and Marco, and they agree to host the wedding at the winery. They work tirelessly to prepare for the big day, and tensions run high as their respective styles clash. Meanwhile, Lexi and Marco have their own issues to deal with as they navigate their relationship and plan their nuptials.
As the wedding approaches, Frankie and Nate find themselves growing closer as they work together. They also begin to see that their differences can be complementary, and that they have a lot to learn from each other. In the end, the wedding is a success, and all of the couples are left feeling more connected than ever before.