Nobody leaves Osiris. Adelaide Rechnov. Wealthy socialite and granddaughter of the Architect, she spends her time in pointless luxury, rebelling against her family in a series of jaded social extravagances and scandals until her twin brother disappears in mysterious circumstances. Vikram Bai. He lives in the Western Quarter, home to the poor descendants of storm refugees and effectively quarantined from the wealthy elite. His people live with cold and starvation, but the coming brutal winter promises civil unrest, and a return to the riots of previous years. As tensions rise in the city, can Adelaide and Vikram bridge the divide at the heart of Osiris before conspiracies bring them to the edge of disaster?