In the morgue late at night, prosecutor Lin Shen opened the corpse's chest and took out the heart. Criminal police captain Xu Jin put a gun against the back of his head: "What are you doing?" Lin Shen didn't look back: "I'm saving him."
A drug sustained-release capsule hidden next to an artery turns an ordinary floating corpse into the key to an unsolved case. Three years ago, the informant Xu Jin handled "accidentally drowned", and a key page was missing from the forensic report; three years later, a similar death method and a similar "strange-flavored candy" brought the two back to the same investigation table.
The private hospital that houses undocumented persons, the human experimentation project code-named "Deep Sea", and the serial exterminations that were covered up at all levels - the truth that Xu Jin was unable to get to the bottom of back then was now revealed by Lin Shen in an almost paranoid way.
One pays attention to procedural justice, while the other does not hesitate to cross the line to achieve his goal. They worked side by side in the archives all night, depended on each other for life and death in the warehouse explosion, and faced off against the entire dark system in court. When all the evidence pointed to the untouchable mastermind, Lin Shen asked Xu Jin: "Do you believe me this time?"
A game between two powerful forces, a suspenseful criminal investigation. Between the bones and the truth, what they finally save is each other.
Intent: In the process of pursuing the truth, the struggle between breaking the rules and adhering to the procedures, and the mutual redemption across the darkness.