"The Split" is a British drama series about the life of lawyer Hannah and her family. Hannah's mother and sisters are involved in the same legal business, but Hannah decides to separate herself from them and starts working for her husband in a competing company. Meanwhile, her father Oscar returns to London, and her husband Nathan becomes dissatisfied with their family life. As Hannah interacts with these two closest men in her life, she realizes that years of legal practice have not helped her save her own marriage.