Bomb disposal expert Song Xubai and Xu Ying, the daughter of the bomber, met unexpectedly because of a subway bomb case. In order to clear her father's unjust case, Xu Ying approached Song Xubai as a trainee reporter. However, she discovered a "toy bomb" made by her childhood in his studio, and the dust-laden memories and unsolved mysteries suddenly came to life.
In the game of life and death, the countdown to the time bomb stopped at Xu Ying's birthday number combination, and the mysterious objects locked in Song Xubai's workshop hinted that the fate of the two had been entangled many years ago. As the investigation deepens, the grievances between their parents, the tampered truth, and the hidden secret codes gradually come to light. They test each other and redeem each other in bomb disposal crises. Little do they know that this approach that started with revenge has already quietly developed a deep love that spans life and death in the smoke and heartbeats. When truth and love reach the end of the countdown at the same time, can they decipher the ultimate code of fate in the light of the explosion?
