A British science fiction drama set in a near-future world where lifelike android servants, known as Synths, have become commonplace in domestic and professional life. When some of these Synths begin to exhibit signs of genuine consciousness and emotion, questions arise about identity, free will, and what it truly means to be human. The series follows several interconnected characters — both human and synthetic — as they navigate the social and ethical tensions of a society struggling to define the boundaries of personhood.