After lurking in the enemy's camp for three years, Yu Ting was removed from the list by his own people and searched throughout the city, with the gun pointed at the back of his head.
But he was born with the ability to "listen" to the battlefield - the rhythm of transmissions, the noise of breathing, and the hesitation between tapping the code are all keys to deciphering intelligence.
The enemy wanted to use him as bait, so he uprooted the intelligence network in enemy-occupied areas; while his own people waited to see him killed, he revealed the list of moles and silenced the entire headquarters.