With the hellhound's reign on Ariala finally behind them Lexi, Jamie and Callum find themselves spending a relaxing summer in Ariala. They see the island, meet Max’s pack, and spend countless nights swimming at Sadie’s cove. But when a treasure hunt for her dad’s lost halo leads Lexi and her friends into danger they find themselves putting their trust into an all-powerful warlock Hylas. While uncovering secrets about Ariala and the people in it Lexi tries to keep her eye on the target but struggles when a guardian angel offer threatens the life she has planned with her group from the United States and maybe even her own halo.