In a detective story full of bizarre twists and turns, perfectionist Cheng Yang and analytical reasoning expert Jun Wugui represent the boys while Su Wenyue who is skilled in martial arts and the quirky Ouyang Chuchu are their female counterparts. Together, they examine every piece of evidence to shed light on the truth.
Prosecutor Jun Wujiu is sentenced to prison after he was framed for a crime he did not commit.
Filled with hatred, he is determined to avenge his teacher and fiancee. In spite of his circumstances, he relies on his wisdom to solve many cases and uncovers an earth-shattering secret.
Can the mayfly shake the tree? Can a prisoner exact justice?