When Shadow, whose job all her life has been to stay close to the young queen and prevent her prophecied death at the age of sixteen, fails in her task and the castle is thrown into chaos, she escapes along with a young knight, embarking upon a journey that eventually reveals her true identity.

Holey cheese, it was strange! All across New Mouse City, rodents kept telling me I₂d done things I had no memory of. Was I going crazy? Had the cheese finally slipped off my cracker? No, that wasn't it. I soon discovered the truth: There was a Geronimo lookalike going around, pretending to be me! He'd even fooled my sister Thea. Worst of all, he was trying to take over The Rodent's Gazette! I had to get that greedy impostor's paws off my newspaper,...

Not long after her family becomes wealthy, Diana Lynch's long-lost uncle appears and starts ruining her social life, causing Trixie Belden to investigate whether Uncle Monty is an imposter out to steal the Lynch fortune.