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 six-year-old Leonie.

Hit Miss follows Mia's attempts to mix her killer instincts with her new maternal ones, in a search for her own identity. A lethal killer at the heart of a troubled family in the middle of nowhere is where the series begins.