It's Monday morning, Bridget has woken up with a headache, a hangover and her boss.
Bridget Jones is frustrated; she is thirty-something, still single, and worried about her weight.
She works at a book publishing company in London where her main focus is fantasizing about her boss Daniel Cleaver. On New Year's Day, she finally decides to turn it all around and starts her own diary, which covers all her attempts to stop smoking, lose weight, and catch her Mr. Right. Lawyer Mark Darcy, Bridget's mother's favourite choice for a future husband, does not appeal to Bridget at all.
After seeing him at a Christmas party at her parents' house, she finds Mark to be annoying and arrogant.
Bridget and Daniel begin to flirt heavily at work and eventually start dating, despite the fact that he is a notorious womanizer with a questionable personality. Bridget learns from Daniel that he and Mark have a history and as a result, hate each other dearly. Daniel informs Bridget of their fallout, telling her that Mark broke their friendship by sleeping with his fiancee.
After Daniel's dubious character becomes clearer and clearer to Bridget, she breaks off their relationship when she catches him with another woman, a colleague of his from work in New York.