Tom Perrotta's thirty-ish parents of young children are a varied and surprising bunch. There's Todd, the handsome stay-at-home dad dubbed "The Prom King" by the moms of the playground; Sarah, a lapsed feminist with a bisexual past, who seems to have stumbled into a traditional marriage; Richard, Sarah's husband, who has found himself more and more involved with a fantasy life on the Internet than with the flesh and blood in his own house; and Mary Ann, who thinks she has it all figured out, down to scheduling a weekly roll in the hay with her husband, every Tuesday at 9pm. They all raise their kids in the kind of sleepy American suburb where nothing ever seems to happen - at least until one eventful summer, when a convicted child molester moves back to town, and two restless parents begin an affair that goes further than either of them could have imagined.