Twelve-year-old Marcus enters Mr. O's rigorous training program to hone his newfound magical abilities, but his mentor's alarming behavior makes him reevaluate his values and priorities.

12-year-old Marcus Pennrider feels far from magical. He's trying his best to balance school, a part-time job, and familial responsibilities that include looking after his little sister. On top of that, he's settling into living with his aunt in the vibrant city of Grand Park, after healing from his experience with his abusive father. When Marcus discovers a secret magic flows through the streets of Grand Park, everything seems to start changing for the better. Even Mr. O, the local corner shop owner and beloved leader in the community, takes Marcus under his wing to teach him how to use magic. Maybe if Marcus becomes a Divinator, he can prove to the world that he's not just a burden -- that he's nothing like his father. But as Marcus strays farther from his family and into the strange world of Divination magic, he becomes entrenched in a rigorous magical training program and increasingly dangerous relationship with Mr. O. It'll be up to Marcus to discover who his true family is, and that perhaps the real magic of Grand Park might lie in something much closer to home.