Something is very wrong inside the Nightmare League.
Director-General Clawfoot has lost her memory – and Max Pidgeon suspects someone at League HQ is responsible.
With the League’s future at stake, Max needs to find the traitor and restore Clawfoot’s memories, all while battling new monsters beneath the city streets with his unit. He also has to work alongside his dad – which isn’t going well. As if all that wasn’t enough, Max has his own secret that he’s hiding from everyone.
Meanwhile, something sinister is stirring in the Abandoned Deep . . . and it’s only a matter of time before it surfaces . . .