Avenel is a fabled assassin now retired to a life of solitude. Deena is a sheltered village girl unaware of her own heritage. When tragedy leaves Deena orphaned and homeless, the two embark on a journey across the continent, bound together by Avenel's promise to keep Deena safe. But when a prophesied sign of the end of the world appears, their journey becomes about more than just the fate of a single girl.