As the daughter of the greatest thieves in all of Japan, Sora Wakahishi decides to spend her 17th birthday committing an epic jewel heist to make them proud. In the middle of the theft, the goblin Rumplestiltskin appears and reveals that Sora's parents have sold her to him! Betrayed by her parents, her lifelong calling as a thief revealed as a farce, and her ninja teammates nowhere to be found, Sora's only chance is to turn for help to the museum's security guard: her arch-rival, goody-goody superheroine Tomorrow Girl!