A young and beautiful scientist is conducting an experiment to study sexual behavior. Soon the attraction gets out of control.

Ben and Jeff are about to take their successful Internet startup company public and hit the jackpot for which they have been working so diligently. Ben is dating a beautiful yoga instructor named Caitlin, while Jeff is seeing Sara, an ambitious model. However, the men decide that they are suspicious enough of their respective girlfriends' intentions to set up a little test of their fidelity, and each sets out to seduce the other's lover.

With an eye for excitement, James has a habit of filming the erotic exploits of his neighbors. But when one of his tapes catches more than he anticipated, James winds up the victim of a vicious hit-and-run. Enter James' ex-girlfriend Lena Slane - a photojournalist looking for her opportunity to blow the case wide open. However, when the clues start to point to Lena, she realizes this isn't about a story anymore....it's about her life.