The city isn't just watching. It's listening. And it's hungry.Disgraced detective Sierra Calder lost everything-her badge, her reputation, and her partner-pursuing a truth no one else would believe: people aren't just going missing in New York's subway tunnels. They are being erased.Haunted by the "static" of the vanished and the scent of ozone that precedes every disappearance, Sierra is forced into the shadows to continue her hunt. When a reclusive hacker known only as the Locksmith offers her a way to track the digital ghosts of the victims, Sierra uncovers a terrifying conspiracy buried beneath the city streets.Project Axiom, led by the enigmatic Maestro, isn't just a government cover-up; it is a cosmic machine designed to harvest human consciousness to "optimize" reality. The system sees humanity as data, and it is culling the variables.But the machine has a flaw. To defeat an enemy that controls the laws of physics, Sierra must assemble a team of broken outcasts: a rogue technologist, a compromised inspector, and a gifted cellist whose music holds the resonant frequency capable of shattering the system.As the Vanishing accelerates, Sierra and her team must infiltrate the heart of the conspiracy and play the one thing the Maestro cannot predict: The Wrong Note.