Five years after the fall of the old Council, peace on the surface is fragile. Dani Langley-now mated to Lucian Barlett and crowned as queen-has carved a new order from the ashes of war. But when a mysterious tidal surge strikes the Hollow Kingdom, carrying with it ancient sigils and a warning etched in salt, Dani knows their battles are far from over.The ocean stirs with ancient magic. A realm long thought buried-the Glass Sea-begins to rise, awakening kings from a forgotten age and threatening to reclaim dominion over the world above. As the tides swell, so too do the powers of Dani's young son, Ryven, whose prophetic visions hint at an even deeper reckoning.To protect their realm, Dani and Lucian must form uneasy alliances with sea witches, shifters, and long-exiled bloodlines. But danger comes not only from below. Elissa, a beautiful and cunning emissary from the sea, offers aid-but harbors secrets and a bitter vendetta that could shatter everything they've built.As storms gather and the boundaries between land and sea blur, Dani must confront her deepest fears, embrace her growing power, and risk everything to hold back an ancient force threatening to drown the world in memory and magic.In the end, when the sea calls-someone must answer.