Is it possible to imagine mathematics as an adventure full of unexpected events, family secrets and dangers lurking at every turn? But this is exactly what awaits fourteen-year-old Becky Griffin, who by the will of fate ended up in the university city of Newton. Fascinated by mathematics since childhood, she manages to get into a tournament in which only boys can participate, and finds herself in a whirlwind of serious mathematical duels and adult intrigues. The reader can expect not only tournament battles and journeys through medieval dungeons, but also interesting historical facts and, of course, exciting tasks, clever riddles and puzzles. For middle school age.