艾拉是一位室內設計師，事業處於上升期。她住著豪宅，和丈夫也非常恩愛。但艾拉不想要孩子，因此遭到眾人嫌棄。艾拉決定參加一項專門研究生育問題的臨床試驗。療法非常有效，令她稱奇，但她要為此付出何種代價？

The passage of time is probably the only concrete proof we have that justice exists in this cruel world. Some people would like to stop time in its tracks, while others choose to follow its path. In this story, three men in their early thirties have reached that age when it's time to start thinking about "getting a life", perhaps starting a family. But how do you handle the fact that your friendships are changing? That, slowly, your new family is becoming the center of your ever-shrinking world? What do you do when you realize your youth is a thing of the past?

Why are you more likely to have a heart attack at eight o'clock in the morning or crash your car on the motorway at two o'clock in the afternoon? Can taking your medication at the right time of day really save your life? And have you ever wondered why teenagers will not get out of bed in the morning? The answers to these questions lie in the secret world of the biological clock.