Asha Akindele has lived her whole life on Gahraan, just like the rest of humanity, eking out an existence between factory assembly lines and constant terror. Then she discovers she has a sister imprisoned by Emperor Thracin, and is forced to make a choice: remain a slave, or escape and risk everything in the name of family. With the help of hopeless time-traveller, Obi, who just wants to return home to London, 1812, and his almost-boyfriend, George IV, Asha must travel through the stars in an attempt to save a sister she’s never met, yet vowed to rescue – and in doing so save worlds.