Hetty starts her new life in a grand country house but is immediately drawn into a world of mystery. And a London gang are searching for her, too.

Hetty plans to rescue a kidnapped girl, leading to a final confrontation with her old enemy.

Hetty makes a daring escape. She soon learns the streets of London are a dangerous place - how will she survive?

Will Hetty find the secret book that could bring Matron's downfall? And why are so many of the foundlings falling ill?

Hetty is shocked when she discovers that Matron has sinister plans for her future. But how can Hetty stop Matron when she's locked in a cellar?

Special visitors to the hospital are caught up in a fight among the boys, while Hetty tries to discover what Matron has planned for her.

Hetty discovers that others are planning a daring visit. Meanwhile, Vince blackmails Nurse Winterson to get special treatment.

Hetty's plan to help Nurse Winterson backfires when an innocent man is accused of theft.

Hetty searches the streets of London for Ida, not realising Matron has her own plans to find her. Will the police reach Hetty first, before Matron's friend gets rid of her forever?

Hetty helps a street girl who breaks into the hospital looking for safety. However, they are unaware that Matron has her own reasons to find the young girl first.