Hetty Feather is a Victorian foundling, enduring all the hardships of foundling life. She lives in the foundling hospital and has many adventures. Hetty and her friends: Harriet and Polly often meets her foundling brother Gideon, along with their secret friends from the boys' wing (Mathias, Ned and Walter) up in their secret tower, where they make plans against people such as Matron Bottomly and Sheila and her "shemob". The gang often find themselves in tricky situations, but manage to keep their friendship.