Loronté's steam can no longer support the powerful nation. Across the sea, Pathf, a previously poor and over-populated land is growing in power, and tension between the two lands is at an all-time high. Sienna had always lived a perfectly sheltered life. Her parents were honoured alchemists, her friends distantly noble, and she was engaged to her childhood friend. But when Sienna's parents develop a mathematical formula to harvest electrical energy from lightning, they are suddenly arrested on charges of a treasonous nature. Sienna embarks on a journey to clear her parents' names before they are executed, carrying the formula which will save her homeland from war. But war and peace are relative things, and she will discover that her world is no longer black and white.