InthemonthsfollowingthesuccessfulresolutionoftheLulaLandrycase,businesshasimprovedforprivateinvestigatorCormoranStrike.Whilehandlingasteadystreamofdivorcecasesandtheoccasionaljobonbehalfofatabloidjournalist,StrikeisapproachedbyLeonoraQuinewithapleatolocateherhusband,thenotoriouswriterOwenQuine,whohasdisappearedwithoutatrace

A twelve-year-old girl is transported by a magical black stallion to the mystical world of Albion, where she discovers that she alone is the key to saving an entire race of people.