Memorial was often bullied, but He Han protected him every time. The two grew up together, and their bond became increasingly deep.
Later, the two became criminal policemen, but He Han was tortured and killed by drug dealers during an anti-drug mission.
To commemorate the revenge of capturing his enemy with his own hands, it's just that He Han, who always protected him, will never come back.
Intention: Hatred cannot make up for losses, extreme revenge will eventually trap oneself, and sticking to the bottom line of the law is the right way.