Bullet Brain(2013)

Bullet Brain is a Hong Kong series set in the 1960s that follows Ko Tai Hei, a sincere smuggler turned police officer. After a gunshot wound leaves bullet fragments lodged in his brain, Tai Hei experiences a dramatic transformation: his IQ skyrockets, making him a brilliant detective capable of solving bizarre cases. But the injury comes with a dark cost. As his intellect sharpens, his humanity dulls. Tai Hei becomes cold and ruthless, willing to bend or break the rules to close cases. The series explores the tension between his extraordinary detective abilities and his increasingly unscrupulous methods, as he navigates 1960s Hong Kong's criminal underworld with a mind that's both his greatest asset and his deepest curse.