Pickpocket Gabriel Avery faces a new secret life when he is recruited to Crookhaven, a school for crooks where students are taught to beat criminals at their own game.
Rivalries intensify between Merits and Legacies during the break-in challenge. Meanwhile, Amira deals with the consequences of her brother's betrayal, and Gabriel makes a shocking discovery.
The school goes into lock down when the Nameless attack. Gabriel and the gang are on a mission to discover the family secrets that Crookhaven is keeping hidden.
A spy wreaks havoc in the school, Gabriel's search for his parents leads him into the heart of Crookhaven, and Edgar will stop at nothing to win the shilling test.
The Crooklings are back home and breaking school rules, Amira and Nicki lock horns as Penelope demands answers, and a real-world heist brings the gang face-to-face with the enemy.
The Crooklings compete at the cutthroat trials, with the eyes of the crooked world watching. The Nameless spy resorts to desperate measures, and Jia leads the search for Amira.
The Masquerade Ball reveals everyone's true colours, an enemy within forces Gabriel to question everything, and Caspian's plan starts to unravel, putting Penelope in grave danger.
