Eight-year-old Nicolas can't wait for school to end so that summer vacation can begin, and he is over the moon when his parents and grandma surprise him with a trip to the Hotel Beau-Rivage by the sea. Leaving all of his worries behind, Nicolas embarks on a summer filled with newfound friendships, adventure, and surprises beyond his wildest dreams. He bonds with new friends, explores the beauty of the ocean and its creatures, and even discovers secrets of the hotel that make this vacation one he will never forget. Whether it's scuba diving with gorgeous mermaids, catching rare sea creatures, or taking boat rides with new friends, Nicolas realizes that vacations are about making precious memories and realising the power of imagination.