Mia is a contract killer with a secret: she's a transgender woman. After a young life where she never quite fitted in, Eddie, an underworld linchpin, took Mia under his wing and created a brilliant assassin.But Mia's life is turned upside down when she receives a letter from her ex, Wendy, who reveals that she's dying from cancer - and that when they were together Mia fathered a son, 11-year-old Ryan. Now Mia is his legal guardian. Travelling to a tiny village in West Yorkshire to see the boy, Mia meets the rest of Wendy's farmhouse clan: 16-year-old Riley, 15-year-old Levi, and 6-year-old Leonie.