Lance, a top class Dragon Caller, and his Tamadra Devi, appear in Vienna City chasing what appears to be a meteorite. The Ace, Rena's son, hears a voice calling him by name several times, and finding an egg with a star shape on it, he brings it home. A monster starts attacking the city, affected by Drop Impact, and Lance tries to stop it using his monsters, while an Devi teaches an agitated Ace about. During the battle, Ace is able to help Lance by drawing water Drops by listening to the egg, when Lance is unable to draw them out himself.

Lance manages to calm down the monster, but the SDF choose the same moment to start attacking it - which enrages the monster again. Lance continues fighting and as Ace is feeling desperate, the egg, almost hatching, encourages his again to get the Drops, using which, the monster is finally dispersed. The egg hatches into a white Tamadra called Tamazo. Later in the day, Ace tries to call Drops, but is unsuccessful. A stranger appears before him and advises to go to the Dragon Museum. He meets a young boy, Charo, a Dragon Caller enthusiast. And he also meets Lance, who has followed Tamazo, to take it with himself. But Tamazo returns to Ace. They meet Garnet, another Dragon Caller, who challenges them to a fight, but ends up retreating after seeing Ace gather Drops, but she later tells Sonia (the stranger from earlier) it was because she didn't want to battle in the middle of the city). Meanwhile Rena converses with someone over the phone, telling them that Ace was carrying an egg similar to the one King had. The person on the other end advises her to send Ace to the Dragoza island. Meanwhile, Tamazo is kidnapped by a group of people.

The kidnappers turn out to he SDF. Ace and Charo try to rescue Tamazo, while Lance wastes most of his time on Govt officials, who just make him go around in circles. Ace and Charo manage to rescue Tamazo following his instructions, and an irritated Lance blasts his way into the base too, only to find the cage empty. Charo convinces Ace to become a Dragon Caller along with him, and they leave for Dragoza island.