Perfect Number (2012): Cast, Box Office & Plot

Kim Seok-go showed a lot of promise as a brilliant mathematician when he was in school, dedicating himself to numbers and theories rather than friendships. Now in his 30s, he’s an ordinary high school math teacher, a far cry from the bright future his youth promised. Seok-go is solemn and introverted, and his morning exchanges with Hwa-sun, the cafe employee he buys lunch from, are the brightest part of his day. When Hwa-sun’s ex-husband mercilessly beats her and her niece, she kills him. Seok-go overhears the fight from his house next door and decides to cover up the killing, determined to protect her from the police. He uses his genius to meticulously plan the perfect alibi for her, and thanks to his careful work, Hwa-sun is cleared in the case.