When Brooke Bennett arrives in Ireland, she is thrilled to explore the country and connect with her ancestral roots. While touring the countryside, she stumbles upon Castle Hart, an impressive estate owned by the charismatic Aiden Hart, Earl of Glaslough.
As fate would have it, Brooke is mistaken for an elite event planner and is hired to host Castle Hart's annual Christmas party. Brooke is initially hesitant to take on such a big responsibility, but her love for organizing and decorating Christmas events compels her to accept the challenge.
As she starts to plan the party, Brooke finds herself getting closer to Aiden and his family. She learns about their rich history and culture, and begins to realize that she has a lot in common with them. As they work together to create the perfect Christmas celebration at Castle Hart, Brooke and Aiden's relationship starts to deepen.
However, when Aiden's ex-girlfriend shows up, Brooke starts to feel insecure and unsure about her place in his life. With Christmas fast approaching, she must decide whether to open her heart to Aiden or continue to play it safe and guard her feelings.
In the end, Christmas at Castle Hart proves to be a magical experience for Brooke and everyone involved. They all come together to celebrate the holiday season, connect with their loved ones, and create lasting memories that will carry them through the years to come.