Stepping through the gates of Blackstream, an all male prison, to take up position as resident prison psychologist, is Louisa Correlli (Deborah-Lee Furness) with her expertise about to be tested. Her interest is immediately sparked by Kevin Jones (Hugh Jackman), like her a new arrival, but in prison as a convicted armed robber. Through experiences with the inmates and her fellow prison staff, Correlli becomes increasingly involved in prison life but a growing relationship with Jones threatens to unravel her world.