In the weeks leading up to Gilbreth, New York's annual AutumnFest, twelve-year-old woodcraft legacy Minna Treat is struggling with looming deadlines, an uncle trying to hide Very Bad News, and a secret personal quest. When she discovers mysterious bottle messages under one of the village's 300-year-old bridges, she can't help but wonder who's leaving them, what they mean, and, most importantly...could the messages be for her?

Along with best friend Crash and a mystery-loving newcomer full of suspicious theories, Minna is determined to discover whether the bottles are miraculously leading her toward long-lost answers she's been looking for, or drawing her into a disaster of historic proportions.