From the day he was admitted to the police academy, Yu Gexing told himself that he must be a good policeman from now on. It is their bounden duty to support justice and apprehend criminals.
After so many years, he will never forget the oath he swore under the national emblem. The right path in the world is subject to vicissitudes of life, and justice is in his beating heart and will not change until he dies.
However, he met some people who tried to change him but were eventually changed by him. Who is whose calamity? Let's see.
Jingyu sings.