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.
Believing they have tamed all the wild winged horses, stable groom Rahkki and his Sandwen clanmates are stunned when a wild herd flies over their village, but this herd has crossed the ocean hoping to settle in a free land, unaware of the Sandwens.
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.
When Hannah and her best friends accidentally spark an enormous and deadly wildfire, their instinct is to lie, but as the blaze roars through their rural town, Hannah's friends begin to crack and one ends up missing.