One fateful day, Lucy is invited to study at the prestigious Overworld Academy. The Academy offers her the opportunity to learn all of the secrets of the Overworld—and it’s an opportunity she can’t miss. She’s sad to leave behind her friends Henry and Max, but it’s time for her to have an adventure on her own. At Overworld Academy, she meets two new friends, Jane and Phoebe. Jane is an expert fighter, and Phoebe is a talented alchemist. With Lucy’s own knack for treasure hunting, the trio makes an incredible team. And when the school is attacked by zombies, the three girls are going to have their skills put to the test.