Out of the 832 souls living on the Vessel, there are only fifty-nine children, and Calara is the oldest by far—a lonely age to be. Her people fled their ancestral lands three generations ago, learning to endure a harsh life on the open sea. Now their numbers are dwindling. When Calara develops the rare ability to dream the future, the Vessel's survival falls into her young hands.

 As she struggles to understand her own power, the dreams lead to an encounter with a strange race of land dwellers. They hold the key to either saving the Vessel's people or destroying them, and Calara might be the only one who still believes the future can change. But dreams aren't an exact art, and choices make a difference in unpredictable ways.