London, 1855. In the grey mist of the early morning a body is dumped on the shore of the Thames by a boatman in a metal canoe. Talk soon spreads of the killer and his striking accomplice: a young widow in mourning dress. Birdie Quinn's sleeplessness led her to the river that morning. She has always been wilful, haughty, different... but is she a murderess? To clear her name, she must retrace the dead man's footsteps to Orkney and the far north. A dangerous journey for a woman alone, but one she must make to save her life. This gripping, richly layered historical thriller is perfect for fans of , and .