Wren has had enough of the life inside her sheltered city walls, however, being the daughter of one of the most influential families doesn't make it easy to go missing unnoticed. When she escapes, she meets a gang who take her under their wing as well as the leader, Rowan, who takes a particular dislike to her. A mission begins to stop City 12 from constructing a manmade society and desolating those outside the walls. After battling for years, maybe Wren can prove she isn't the sweet innocent girl her society formed her to be - maybe she's the only hope.