In The Secret of Spirit Lake, eleven-year-old Tyra is stuck spending the summer with her irascible Grandpa Rudy in a lakeside town where she's the only black person (she's adopted). Clearly this is going to be the worst summer ever. And a weird one, too. Every night, Rudy disappears into the woods, hauling tools and maps. He's searching for something, and Tyra desperately wants to know what it is.
One night, Tyra follows her grandfather...