Kings Cross, 1969: An ambitious midwife returns from London to uncover a system of forced adoptions at the local hospital. A pregnant country girl, Viv, wakes to find she's been drugged by her parents and sent to a home for unwed mothers.

June 1969. As the world counts down to the first moon landing, Joan flirts with danger at the hospital and makes a powerful enemy. Annie returns home after giving up her baby, but realises her old life is gone forever.

Joan risks her career to help Annie get her baby back, unaware of the implications for Dr McNaughton. Patricia's mother visits from Melbourne and offers her daughter an early exit from Stanton House.

Martha’s reunion with her birth mother turns into a nightmare. Joan and Jim’s relationship is blown apart by a secret from her past. Annie is distraught to learn she is pregnant again.

It’s 1970 and the times they are a-changing. Joan is devastated to discover an infection has left her almost certainly infertile while delinquent teen Maggie is determined to discover the identity of her birth mother.

As Joan struggles to admit her infertility to Jim, Annie faces the death of her father, but not before he encourages her to go to Vietnam as an entertainer.

Annie risks losing her unborn child when she is injured at an anti-war protest. Joan's career as a doctor hangs in the balance following her role in Eva's pregnancy. Shirley makes a life-changing decision to help Maggie keep her baby.

Dr McNaughton is prepared to sacrifice his career to help Joan and Jim escape criminal charges. But is he too late? A drunken bucks night ruins Patty's plans for Martha and Bowditch's wedding. Viv faces a tough choice when Pete proposes to her.

As wedding bells chime, new love blossoms as old loves are lost forever, and amidst betrayal and secrecy, Joan must face the hardest decision of her life.

When Joan goes into early labour, the unorthodox new head of obstetrics is the only one who can help her. Matron has her hands full with three new pregnant girls in Stanton House.

Viv and Martha fight for their rights at the International Women's Day march. When Joan's baby falls ill, Matron is wracked with guilt over the possible baby swap. Debbie defies Matron by visiting her older, married lover.