Stratum makes the archaeological discovery of a lifetime. However, Celestia is not the only ruler who wants it. When the King of the Griffons tries to cover up an ancient secret with force, Equestria is threatened by war.

The Wonderbolts are called up to defend a critical rescue operation from griffon attacks. Instantly overwhelmed, they hold open tryouts. However, Rainbow Dash seems reluctant to seize this perfect opportunity.

What is it that is holding her back? Only Fluttershy knows why her former classmate cannot seem to step up to her dreams.

Without Rainbow Dash, it seems as if all of Equestria will be lost.