In New York City, database developers Haley and Willi foil an attempt to blow up the Manhattan Bridge. Home again, in Centreville, Virginia, a snobbish waiter brings out Willi's darker side, so Haley insists she see a psychiatrist. Then, outside events intrude. A serial killer is murdering pedophiles. A second killer is eliminating famous people who escaped justice, leaving behind a cryptic note-To the determined protector of my just reward. A third killer is murdering parents and daughters, then leaving bizarre notes citing songs about Bill. A hostile takeover of their employer is underway, using The Stroller, an assassin, to ensure the sale. Nora Kelly, an evangelical friend presumed dead in the Sudan, returns, mysteriously saved by Raven H2O, a security contractor known for its ruthlessness. When friends are killed, the twosome are drawn into the tangled web of serial murders, and Haley must deal with the distinct possibility Willi may be one of the killers.