When Zhao Chengran, a young genius of the national fencing team, was diagnosed with a rare multiple personality disorder on the eve of the Olympic trials, a cold "shadow swordsman" lived in his body. But the psychoanalyst Shi Ruoqing, who was ordered to "observe" him, has a deeper secret hidden in him. When the cold front on the field illuminates the conspiracy in the dark, they must join forces to strike a decisive sword on the edge of the cliff between the glory of winning gold and the survival of their personality.
