Human traffickers, don't run! We're going to fight you to the bitter end!
The policewoman Gao Xinyu from the New District Police Station never imagined that a routine prisoner transport would turn into a nightmare. After a car crash and being electrocuted unconscious during a struggle, she woke to find herself a prisoner of human traffickers, locked away in endless darkness.
This turned the once-reckless Li Yaqiang from an unemployed drifter into an undercover cop.
His older brother's sacrifice had yet to be avenged, and the lives of his loved ones hung by a thread. The wastrel who had once drifted through life clenched his fists amid despair and fury. Wiping away his tears, he went straight to the police station. This time, he would don the "invisible armor" his brother had never finished wearing and infiltrate the traffickers' den as an undercover agent.
In the depths of darkness, Gao Xinyu searched for a way to survive while imprisoned. At the edge of evil, Li Yaqiang took his first clumsy but determined steps along the thorny road his brother had walked. As the fates of a policewoman and an undercover agent became entwined in a web of crime, could they tear through the darkness and bring sacrifice and redemption together again beneath the sunlight?
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