Shannon the Ocean Fairy is an installment in the Rainbow Magic series, likely from a sub-series focused on nature and the elements. Shannon is responsible for the magic that protects the oceans, the sea creatures, and the coastlines. When her magical item is stolen by Jack Frost, the ocean becomes chaotic, polluted, and dangerous for all the creatures living in it. Rachel Walker and Kirsty Tate must help Shannon on an aquatic quest, navigating the sea and coastal areas to retrieve the magic and restore the cleanliness and harmony of the vast ocean.