Married four years without children, Peter and Brooke Grand embark on a strict regimen with a renowned fertility clinic which tells them when and how to do "it." The clinic also tells them when to abstain --for log periods-- and "put it in a bottle." It's difficult, of course, but it becomes near impossible when a group of young, highly active singles rents the house next door and they become odd friends and running mates and too damn close for comfort.