Bosch's first job calls him to the estate of ailing billionaire Whitney Vance, where he is tasked with finding Vance’s only potential heir. Along the way, Bosch finds himself clashing with powerful figures who have a vested interest in the heir not being found. Bosch finds an invaluable resource in Maurice “Mo” Bassi, a tech-forward gadget whiz who also shares Bosch’s fondness for smooth jazz and commitment to justice.