Heir to the throne of the Kingdom of Lucebra, Prince Lu lives carefreely, playing pranks on his family and friends. However, according to legend, when he turns 18, he will confront the mysterious Evil Dragon and save the people of Middle Earth. Despite the prophecy, he doesn't believe in the imminent danger and prefers to "troll" his sister, the Enchanted Princess (Gi Alparone), and everyone working in the palace.