Gus discovers a trapdoor leading to the world outside of the mission
Poppy and her brother Gus lives at Bird Creek mission.
Gus is sent to the darkling cellar and while stumbling in the dark he discovers a trapdoor leading to the world outside of the mission.
While cleaning Mother Hangtree's office she finds a mysterious letter with the word ''AUGUSTUS'' on it, which is Poppy's brothers real name.
Gus goes to the darkling cellar and runs away from bird creek mission after Poppy tells him about the letter that people are going to take him away to another place.
After Poppy hears that Mother Hangtree is giving her away to a family, Poppy runs away through the trapdoor in the darkling cellar to look for her brother.
Poppy cuts her hair and dresses up like a boy so people won't notice her too much or take her to do work. She also meets red beard whose name is Frank O'Reilly, Poppy slept in his truck and when she woke up she meets Frank and it turns out he is really nice and helped her.