Henry Cimoli and Spenser have been friends for years, yet the old boxing trainer has never asked the private eye for a favor. Until now. A heavy-handed developer is trying to buy up Henry's condo on Revere Beach and sends thugs to move the process along. Soon Spenser and his apprentice, Zebulon Sixkill, find a trail leading to a mysterious and beautiful woman, a megalomaniacal Las Vegas kingpin, and plans to turn to a chunk of land north of Boston...

Set in the near-future, this series follows employees and patrons of Westworld, a vast theme park modeled after America's Wild West. Over the course of three seasons, Westworld's android "hosts" begin to display aberrant behavior that explodes in violence, and takes the battleground between humans and hosts into the real world.