For Opal Hopper, code is magic. She can build entire worlds from scratch-- but she can't code her dad back into her life. When he disappeared after her tenth birthday Opal tried desperately to find him. Now she's enrolled at a boarding school for technical prodigies, and WAVE, the world's biggest virtual reality platform, has announced a contest where the winner gets to meet its billionaire founder. The same billionaire who worked closely with Opal's dad. The one she always believed might know where he went. The one who maybe even murdered him. As what begins as a small data hack to win the contest spirals out of control, how far will Opal go for the answers she's wanted for years?