Chen Ke, the former king of special forces, joined the "Shadow Guard" organization after retiring and became a top bodyguard. Donghua City is prosperous on the surface, but secretly there are intertwined forces and murderous intent. He was ordered to protect Jiang Shuyue, the heir to the Jiang Group, a cold and aloof daughter. She was caught in the whirlpool of chaebol struggles, repeatedly assassinated, and her trust was hard to find. He has the "three-second prediction" ability, which he uses only three times a day to discern the critical moments before a crisis. While protecting her, he has to avoid the numerous murderous traps laid by insiders, black markets, and institutional giants. Walking on the tip of a knife, startling every step. He uncovered the conspiracy with his calm judgment and quietly melted her cold heart. A battle about trust and life and death begins.