Follow the real-life story of Kelly, whose jealous rows with her boyfriend Nick drive her to tears and violence. Then there's Val, a warm and personable OAP who stalks her ex-husband. And Gordon who made the devastating discovery that his children are not his own. Through his story, we discover that a moderate amount of natural jealousy may offer a healthy evolutionary advantage.
How far would you go in pursuit of someone you desire? For some personality types, the chemical cocktail of desire is so addictive that it drives them to chase partner after partner. Jane craves the thrill of each new infatuation. We also meet Richard who tore his family apart with one moment of passion. Finally watch Ken's quest to find his childhood sweetheart and discover the surprising science behind the power of first love.
