In the final installment of the first act of the Prairie Adventures series, Bartemus and his friends face challenges both from within and from outside the Hollow. At home, conspirators are afoot in Nestings, the town in the treetops above Burrowton, inciting Birds to join a secretive order called the Avians. And far to the northwest, a fanatical Bear draws an army to himself in the hopes of ruling the entire Prairie. Can Bartemus and his friends unravel the mysteries behind these forces and stop them before they drive a wedge between the Critters and those they love?