When you're named after a 250-year-old tortoise, you grow up believing life is full of possibilities and wonder. But ever since Addie's family got turned upside down, those things have been harder for her to see.

The last thing Addie wants to do is make a new friend, but when her dad's summer job takes them across the country, she meets Mateo and finds herself caught up in an exciting project. With the help of a virtual reality headset, she's suddenly scaling castle walls, dodging angry kittens, and seeing the world in whole new ways. Plus, she has an idea that could be bigger than anything she's imagined before, but can she right some wrongs first . . . or is it too late?