Love and sacrifice, failure and redemption, loss and triumph... it will take everything they have to topple their giants in this spectacular conclusion to the adventure that started it all.

With Reid in jail, Lydia missing, and the Jailbirds on the lam, this ragtag band of misfits has nothing left to lose. As tensions between Jailbirds and Bluecoats rise in Mammoth with Orion vying for political office and Graham quickly adopting his new role as Orion's right-hand man, the race to save their friends, expose Orion, and restore legacies long lost comes to its most desperate hour.

All three keys in hand - the Mammoth Key, the Titan Key, and the Leviathan Key - the Jailbirds begin their search for Cuvier's lost vault, a trove of discoveries and wonders hidden at the end of a long trail of ciphers and clues. The Wild Hunt closing in on one side and the police on the other, the Jailbirds are running out of time.

A new friend and ally leads to a new trail of clues, sending the Jailbirds further than they've ever gone before - to the treacherous desert dunes of Egypt - where defeating Orion Clark and claiming their treasure will force them to face their greatest fears.