Finally, the day of Mai's high school graduation has arrived. While Sakuta eagerly waits for his girlfriend, an elementary schooler who looks exactly like her appears before him. Suspicious, and for all the wrong reasons... Meanwhile, Sakuta and Kaede's father suddenly calls, saying that their mother wants to see her daughter. She was hospitalized because Kaede's condition had been too much for her to bear, so what could she possibly want now?

Legends of Dawn: The Sacred Stone follows the story of Claude, an infamous thief, as he attempts to steal the Sacred Stone from the imperial capital. As the story unfolds, viewers are taken on a humorous journey featuring a cast of iconic heroes who attempt to stop him, while also discovering Claude’s true motives for wanting to steal the stone.