Ryne, a mercenary left dying on the southern battlefield, awakens the remains of the Ancient Dragon King with his blood and forms a life-linked symbiotic pact. To track down Jonathan, the mastermind who betrayed his comrades, he enrolls in the Royal Academy as a dragonslayer, evolving from friction to alliance with Erin the elf, Bron the dwarf and others. As the Undead Legion sweeps south and Jonathan conjures a skeletal ghost dragon, Ryne stands with his fellow students to fend off the undead horde and confront Jonathan.