An improverished Russian country girl Elena Rudina and the aristocratic Ekatrina meet and set in motion an escapade that includes mistaken identity, a monk locked in a tower, a prince traveling incognito, and the witch Baba Yaga.

When eleven-year-old Yumi Chung stumbles into a kids' comedy camp she is mistaken for another student, so she decides to play the part.

When an impostor attempts to take over "The Rodent's Gazette," Geronimo Stilton enlists the aid of his sister, Thea, and his cousin, Trap, to reverse the scheme.