Fourteen-year-old Miles Adler-Rich, helped by his friend Hector, spies and listens in on his separating parents. Both boys are in thrall to Miles's unsuspecting mother, Irene, who is "pretty for a mathematician." They rifle through her dresser drawers and strip-mine her computer diary, finding that all leads pull them straight into her bedroom, and into questions about a stranger from Washington, D.C., who weaves in and out of their lives. Their amateur detective work starts innocently but soon takes them to the far reaches of adult privacy as they acquire knowledge that will affect the family's well-being, prosperity, and sanity. Once burdened with this powerful information, the boys struggle to deal with the existence of evil, and proceed to concoct hilarious modes of revenge on their villains and eventually, haltingly, learn to offer animal comfort to those harmed and to create an imaginative path to their own salvation.