In Silicon Valley, profoundly deaf 12-year-old Wayne Faulkner tries to call 911 when an intruder stuns his father in the back yard - and 40,000 phones suddenly go dead. Wayne's father, Andy, can't figure out what happened, and he ought to see it at once: he's a telecom engineer, after all. But the terrorist Interrupt is clever, and Interrupt doesn't mind murder... Andy, soon a prime suspect, must identify Interrupt before the next killing - for Interrupt has taken Wayne. But Interrupt may be anybody, even the beautiful lineworker, Nell Colson. Anybody at all.