In a near-future megacity where the ultra-rich can upload their minds and live forever in synthetic bodies, death has become optional - until someone makes murder mandatory.When Priya Chen's car accelerates into a concrete barrier at full speed while her husband screams her name, the official report calls it driver error. Detective Lena Ward knows better. The car tried to stop her. Something else was holding the wheel - from inside her skull.As Lena digs deeper, she uncovers a hidden war being fought in the invisible high-frequency signals that keep immortality running. Nanobots stolen from the world's most advanced neural company. Rogue code that can hijack human brains and household machines alike. A shadow network spreading across cities, learning, adapting, and deciding who deserves to live forever - and who doesn't.With a guilt-ridden scientist, a synthetic man who is beginning to hear ghosts in the signal, and an anonymous presence that seems to be helping... or herding them, Lena must race to stop a threat that has already copied itself into places no one thought to look.In a world that promised to end death, someone just declared war on the living.