The first night after moving into her fantastic new apartment in San Francisco, Caroline finds herself gaining... um... intimate knowledge of her new neighbor's nocturnal adventures. Thanks to the paper-thin walls and this guy's athletic heroics, she hears not only his bed hitting her wall, but also the frantic responses of what seems (after loud night after loud night) to be an endless procession of women.

And since Caroline is on a self-imposed "date hiatus" and her neighbor is apparently fatally attractive to women, she finds that her fantasies are keeping her awake even longer than the noise.

So when a crash outside the wall threatens to literally throw her out of bed, Caroline, covered in sexual frustration and a pink baby-doll nightie, confronts Simon Parker, her heard-but-never-seen neighbor. . The tension between them is as strong as the walls are thin, and the result is as confusing.

Suddenly, Caroline discovers that she may have discovered a whole new definition of neighborliness...