In Haunted Harbor and the Ghostly Ships, Bexley, Zephyra, and Thorne are thrust into a world of ancient mysteries, ghostly ships, and an oceanic force known as the Abyssal Heart. As newly appointed Guardians of the sea's darkest secrets, they must uncover hidden relics that hold immense power-before they fall into the wrong hands. Guided by a glowing medallion and haunted by the past, the trio faces curses, phantom vessels, and dangerous adversaries bent on awakening the heart's true power. The deeper they venture, the greater the risk, leading to an unforgettable battle for the ocean's fate.