To those who don't know better, Greymaren is a glittering city of order and great invention, its skyline spiked with spires and its shadows playing host to enchanted, dangerous markets where anything may be bought for the right price. But beneath the city's surface is a much older and darker place: a city where the bitter winters can kill, where witches sometimes have the answers, where memories can be bought and sold and stolen, where mad mothers are locked away - and where Elizabeth Graves is about to risk everything to punish a thief.