Star has moved his herd of refugee pegasi to the coast to escape the Mountain Herd and the bitter memories of the past, and as head stallion it is up to him to protect and lead them--but the freezing storms of winter are coming, old enemies are seeking revenge, and an ancient adversary has awoken from sleep.

It has been many moons since Star received his starfire power, and now he will face his toughest challenge yet. Star is gravely injured, and Nightwing the Destroyer vows to make a pact with whoever brings him the black yearling--dead or alive. As Nightwing amasses an army to destroy him and all of Anok, Star must act fast. But as the threat of war looms, Star wonders if the current peace among the united pegasi is strong enough to survive

Even though neither Rahkki nor Echofrost want to be paired as a rider and flier, they must work together to fly with the Sky Guard, free the wild herd of winged horses from the giants, and stop a plot to dethrone the queen.