The cold and charming orthopedic surgeon Lin Mianmian never thought that her reunion with Li Sihan would be under the shadowless lamp. When he lay on her operating table with artificial car accident scars, and when the DNA data flashing on the monitor revealed the genetic truth behind his son's terminal illness, the sting of the contract marriage three years ago finally took on a fatal edge. She grasped the steel nail to repair his shattered tibia, but was forced to face her collapsed life - the mysterious remittance on the 15th of every month, the pregnancy test record that was smeared on a rainy night, and the genetic scar under his collarbone that was homologous to her son. In this doctor-patient game with bones and blood as the bet, the sharp scalpel cuts open not only the dislocated joints, but also the business war conspiracy that has been buried for ten years. And when the paternity test report crashed through the door of the intensive care unit, they were shocked to realize that the most painful thing was never the bone setting, but the sober sight of each other being reborn a thousand times in lies, but still choosing to nail their love to the dead bones of fate.