Su Wan, a top investment banking elite, suddenly encountered a black swan incident due to the huge merger and acquisition case he was responsible for, and his career was hanging by a thread. Gu Yehan, the young marshal of the Technological Empire, is deeply involved in internal and external troubles and is in urgent need of a break. A one-year secret marriage contract binds two extremely rational souls. At first, this was just a cold transaction where each got what he needed: he used her to stabilize the morale of the army and paralyze his opponents; she relied on him to find out the truth and turn over the enemy. However, in the vortex of family strife, capital fighting, and conspiracy, the boundaries between chess players and chess pieces gradually blurred. From scheming against each other to trusting each other in life and death, from acting together to pretending to be real, two proud souls collided with each other and created unpredictable sparks. When they decide to join hands, they not only eliminate the evil spirit and take charge of the empire, but also jointly define an evenly matched love and a future created by equals in this world of cold rules. This is a confrontation that begins with a contract and ends with the resonance of souls.