The Emerald Princess Plays a Trick

In the Jewel Kingdom, four girls rule: Roxanne is the Ruby Princess, Emily is the Emerald Princess, Sabrina is the Sapphire Princess, and Demetra is the Diamond Princess.
Princess Emily has always loved a good prank. But when one of her subjects is seriously hurt, everyone suspects her. Although she had nothing to do with it, Emily has lost the trust of her people and must find a way to earn it back.