Leo Fender is an unlicensed PI who finds lost pets in New York City—until a routine cat rescue leads him to an invisible familiar, a talking badger, and a hidden world beneath Greenwich Village. Hired by the enigmatic Finnian, Leo discovers that his city is a crossroads between dimensions, and something is slipping through. His first case: investigate a Brooklyn bookstore run by a man who died in 1978 but doesn't know it. What follows is a journey into magic, identity, and what it truly means to be human.