Based on a novel of the same name, THE ONE is a British series that takes place in a near future, where couples are matched via a DNA test. The show explores the pros and cons of this discovery, but its main plot involves a murder mystery and the charaacters at the center of it. The story focuses on Rebecca Webb (Hannah Ware,) the evil-doing CEO of the titular company, as well as the friends, foes, and law enforcement that get tangled up in her lies, deceipt, corruption, and criminal activities. Several subplots, including those involving characters who've found their "match," spawn a number of twists and turns.