A historic cold case. A family crisis. And one girl with all the answers. From New York Times bestselling author and National Book Award finalist Kekla Magoon comes an intimate small-town mystery, where not everything is what it seems.

Whatever the issue is, Sage Sullivan can figure it out.

At least, that’s how it goes in Sage’s house. Between managing her mom’s forgetfulness and taking care of her brother, she only gets to be a normal twelve-year-old when she’s with her friends.

It’s just Sage’s luck that this summer, the Sullivans are going to her eccentric aunt’s manor, which means zero friend time. The last thing Sage wants is to solve more family problems—yet what she finds at the manor is far more interesting. Houses are being damaged by a mysterious vandal. There’s Rosemary, the most captivating girl Sage has ever met. And the locals won’t stop mentioning an old museum heist that remains unsolved to this day. . . .

But when the clues lead to a family crisis, it’s a quick reminder of why she has to keep everything together. Can she get to the bottom of this mystery in time to save the day? Or is there a limit to what Sage can do after all?