Rubin comes from a powerful bloodline of people who use magic, but he can’t seem to make magic work the way it should. He’s a Summoner, yet he never summons what he actually wants. Instead, it’s always the one thing he doesn’t want that appears.
Rubin harbors an audacious dream: to defeat a dragon. One day, he inexplicably summons a mysterious child who claims to be a prince. Drawn in by the prince’s words, Rubin and his companions set off on a perilous journey toward the dragon’s castle. But what awaits them at the end of the road? And what hidden truth lies behind Rubin’s strange, uncontrollable magic?