Life on Fortune is hard. The atmosphere is poisonous, the planet hardly fit for life. For years the colonists have struggled, forbidden from returning to the Mothership until they develop the technology of spaceflight for themselves. Cora suffers from a rare condition, brought about by her contact with the alien animal she pilots, quarrying vital water for the colony. Signy is the only person who can save her - but to do so, she must break the rules that govern their lives, and risk her livelihood and the other colonists who rely on her for survival. But, as Cora and Signy meet, grow, and fall in love, they begin to yearn for more than mere survival . . .