There is no running water left in the world. The only source of the liquid of life is housed in the Ice Floes. Thousands of massive rotating rings of ice that float in the sky. No one knows how they exist or why; some think it has to do with the Precursors, an ancient race that have been lost in time. Now, the only way to get the much needed water is by airship; brought back to city state known as Summit and melted down in factories. Though taxed heavily by the Conduit, the corrupt ruling government, the ice is now delivered only to those who can pay. Harvesting ice is a dangerous profession; but that is what Dash Starheart and his father do; they are Ice Farmers.
But when a trip into the Floes show Dash and his dad a secret that was never meant to be discovered, his father is captured by the Conduit and Dash manages to escape. Now on the run, Dash, his best friend Kestryl, and a group of rebels, must figure out the secret of the Floes before the Conduit finds a way to silence them, permanently.