Sophie embarks on a perilous journey teeming with misunderstandings, prejudice and injustice when she sets out to find her missing father.

Labeled a cheater by a school that fails to identify her extraordinary mathematical abilities, she competes against the Human Calculator, who will use every trick up his sleeve to prevent being defeated by a thirteen-year-old girl. But before Sophie can reunite with her father, she first needs to put an end to a grave injustice, which requires her to catch an elusive serial killer.

Can Sophie’s mathematical powers save her and rescue an innocent?