Talented and successful surgeon Daniel Milton has his world shattered when his wife Beth develops a fatal degenerative disease. After conventional treatment options run out, Daniel partners with the lonely yet resourceful Lee to start a literal Underground clinic in the vast network of tunnels beneath Temple Tube Station in London.

Jimmy has just been released from prison after 12 years and is struggling to come to terms with his new life. His family and friends are finding it difficult to accept him back in to their lives and he must find a way to make things right.