When Cath, an idealistic, hardworking nurse, loses her job for whistle-blowing, she is forced to take drastic measures to provide for her daughter. Seizing the opportunity to steal her friend’s identity as a senior doctor, Cath starts a new life. As she buries herself deeper in the imposter persona, she realises she could get everything she ever wanted – but with her old life threatening her fragile creation, how far will she go to protect it?