In the wake of the First World War, Jonathan Morgan stows away on an Antarctic expedition, determined to find his rightful place in the world of men. Aboard the expeditionary ship of his hero, the world-famous explorer James "Australis" Randall, Jonathan may live as his true self-and true gender - and have the adventures he has always been denied. But when disaster strikes in Antarctica's frozen Weddell Sea, the men must take to the land and overwinter somewhere which immediately seems both eerie and wrong; a place not marked on any of their part-drawn maps of the vast white continent.