Far in the high mountains, there is a mysterious cave. It is dark, and nobody goes there. But inside, the walls are covered with crystals. They shine with blue and green light. A dragon named Drak keeps them safe.
One day, the biggest blue crystal is gone. Drak is very sad. A girl named Mia walks in, and she has the crystal in her pocket. "Do you have it?" Drak asks. "No," says Mia, but she is lying.