When ten-year-old Petya gets a new teacher—strange and grumpy, but incredibly charming—he quickly realizes she's not like everyone else. She's an "undercover nanny," but in reality, she's Yaga, the legendary sorceress who lost her mortar and pestle and hid among humans. Now only Petya can help her regain her magical powers, and Yaga can teach the boy to fly. And not just on the mortar, but in life.
