A graphic novel in which Thorn is imprisoned in a dark dungeon and is guarded by the powerful Crown of Horns, but only Fone Bone can put an end to the war and save his friend.
When Fone and Smiley Bone attempt to return a lost rat cub to the mountains they encounter Rock Jaw, a fierce mountain lion, who dominates the region. Meanwhile, the fate of the rest of the valley is left undecided as the rat creatures continue to cause havoc.
Princess Rose musters up courage to face the dragon that threatens the small towns in the Northern Valley, only to discover the dragon is actually the Lord of the Locusts; and meanwhile, her sister, Princess Briar, embarks on a more sinister quest.
The Bone cousins, Gran'ma Ben, and a baby rat creature are on a perilous quest to Atheia in the hopes of saving Princess Thorn as war rages in the valley.
The adventure starts when cousins Fone Bone, Phoney Bone, and Smiley Bone are run out of Boneville and later get separated and lost in the wilderness, meeting monsters and making friends as they attempt to return home.
Smiley entertains the Bone Scouts by telling them stories about the suspect adventures of the mighty explorer Big Johnson Bone before his discovery of the Rolling Bone River and establishment of a famous trading post.
A prequel to the Bone saga tells of young Princess Rose's quest to defend the small towns of the Northern Valley from dragon attacks and the impact that her actions had on the lives of both friends and foes in the years ahead.