After inadvertently granting King Einon immortality when he gives him a piece of his heart to heal him, the dragon Draco joins forces with Einon's former mentor, the knight Bowen, as they seek to put an end to Einon's reign of terror as the tyrant king rules his kingdom with fire and blood.
As Geoff stumbles upon a dragon imprisoned in a dungeon, he realizes that a wicked knight seeks to find a dragon's heart to fulfill his aim of ruling the world, whereupon Geoff helps him learn how to fly, fight, and defend himself.
When Gareth goes on a perilous treasure hunt and Drago the dragon saves him from death, the two bond together and share a single heart and a single mission: to protect a dragon nest from the evil sorcerer and undo the spell the sorcerer cursed Drago with.
The amazing dragon Drago, who had a strong bond with King Gareth, tries to end the rivalry between the two heirs of the throne, the king’s two grandchildren, and save the kingdom from ruin.
When his family is killed, Lukas's quest for vengeance is boosted by an unlikely ally: a banished dragon who is moved by his plight and desire for justice and decides to help. A sword-fighting mercenary joins them on their trip.