A page-turning sequel to London Deep, half text and half graphic novel, set in a sinking city where two rival police forces--kids vs adults--compete to keep the peace Rebellious teen Jemima Mallard has done the unthinkable. She's joined the Youth Police Department (YPD). Is she serious, or is she spying for the criminal Father Thames? Fellow YPD officer Nick Mallard isn't sure. Before he can test her loyalty, the two must go to war. Their city is under attack. From the Thames Barrier Reef to the Sink estates, strange ships have breached the defenses. London hasn't seen anything like these raiders--adults and kids sailing and working together. But orders are orders, Jemima must find a way to stop them. Can Jem and Nick find find a way to turn them back?