Bridget Jones finally had a serious relationship with Mark, but ends up breaking up. Now she sees herself alone again, with forty years fresh and single. That makes him decide that now he is going to focus on his work.
At work she is surrounded by friends and Bridget seems to be very comfortable with the situation. In fact, he finally seems to have his life under control, after many years of having a disastrous life.
He has no intention of falling in love again, but through his work he meets Jack, a very smart American who steals his heart. He is all a gallant, so both soon begin a relationship.
Things do not go wrong for Bridget, but she suddenly realizes she’s pregnant. That’s not bad news, but it turns out he does not know if the father is Mark or the American heartthrob he’s with now.