For almost a decade, zoologist Rachel Caine has lived a solitary existence far from her estranged family in England, monitoring wolves in a remote section of Idaho as part of a wildlife recovery program. But a surprising phone call takes her back to the peat and wet light of the Lake District where she grew up. The eccentric Earl of Annerdale has a controversial scheme to reintroduce the Grey Wolf to the English countryside, and he wants Rachel to spearhead the project.