Li Yanchu, a young police detective with a bright future, was suspended within a day due to a mission error, and he also lost his brother who depended on him for life. It took five years to follow the clues and discover that his brother died in a well-planned and malicious murder. The man behind the scenes was so powerful that he could not shake it.
She cut off her long hair and pretended to be her brother, trapping herself in the shadow of memories and unable to escape. He kept his name anonymously and relied on repair shops and hacking skills to make a living. He secretly collected black evidence alone, just to avenge his brother.
Prosecutor Park Jae-won came to find out the truth about the case. One by one old events are exposed one after another, and everyone has to pay the price for the sins of the past.
Intention: Even if pain threatens life, choose to use reason and rules to break through the darkness. Obsession is not the sharp blade of revenge, truth and justice are the way back to redemption.