Christmas At Sea follows the journeys of various Hallmark fans aboard the network's inaugural Christmas cruise, showcasing the joy, connection, and community that define the Hallmark experience. The show features diverse groups of cruisers, including those celebrating significant life moments like a surprise proposal and wedding, or lifelong friends on a girls' trip, and more. The series also highlights celebrity guests, according to Southern Living. It's a joyful love letter to fans, capturing the magic of a Christmas cruise and the heartwarming stories it unfolds