Lin Chen is eighteen. At twelve, he received a heart transplant. Its serial number is S-07. Since he was thirteen, he's been able to hear everyone's heartbeat. The anxious beat loudly, liars miss half a beat, and the dying sound like a string pulled thinner and thinner.
He thought it was just an illness, until one early morning when he heard someone dying outside the building. The killer's heartbeat was as cold as a stone without a trace of warmth. As he was dying, the informant pressed a metal plate into Lin Chen's hand. Two words were engraved on it: Abyss Lord.
Only then did he learn that someone was searching the entire world for the heart that had been beating in his chest for six years. The Special Operations Division of the Ministry of State Security came to him and called him an "Awakened One." The mysterious Doctor Su saw the scar on his chest and murmured, "So it really is you." Even his mother had deliberately concealed the heart's origins.
When your heart has its own serial number, when your heartbeat no longer belongs to you, Lin Chen finally understands: he isn't sick. Someone has "installed" him into a scheme that has been unfolding for six years.
