Between the organic magic of Verdance and the geometric precision of Obelent flows the Mere River. And in the middle, the Shoalwater Lighthouse stands alone. For Thea, magic is an equation to be solved. For Rowan, magic is a conversation-a whisper to the roots, a coaxing of the stone, a wild and living thing that refuses to be tamed. When both are assigned to modernize the ancient Shoalwater Lighthouse, they are forced into a partnership neither wanted. The lighthouse, a crumbling monument to one woman's attempt at cooperation, requires both their magics to survive the coming winter storms. But their opposing methods threaten to bring the tower-and their careers-crashing down. Trapped by the tide and the weight of expectation, Thea and Rowan must learn that the strongest structures aren't built of stone or spell-work alone, but of the fragile, terrifying trust between two people who dare to bridge the divide. A story of magic, memory, and the connections that guide us home.