Bridget Jones is still dating her new love, barrister Mark Darcy, for a perfect six weeks. However, while on assignment in Thailand with her disreputable ex, Daniel Cleaver, claiming to be reformed, Bridget questions if she has everything she's ever dreamed of having.

An alien is left behind on Earth and saved by the 10-year-old Elliott who decides to keep him hidden in his home. While a task force hunts for the extra-terrestrial, Elliott, his brother, and his little sister Gertie form an emotional bond with their new friend, and try to help him find his way home.