The cold spread of the virus has caused panic throughout the city, and even Taiwan's top doctors are helpless.
Yuqi, an ordinary girl next door, accidentally walked to the wrong floor and walked into Ding Xiaoyu's life. The returning J-AQ2533, in order to find out the cold maker - Margaret, and solve the behind-the-scenes mastermind Bluebeard, accidentally met street photographer Lu Jie. The four people were not supposed to have any connection, but they reached the crossroads of fate at the same time.
In the face of past love, Lu Jie's tenderness, Margaret's provocation in the dark, and the overt and covert struggles between the D Alliance and Bluebeard.
Love and betrayal, punishment and redemption...
When the final truth is revealed, what is cold is the human heart and society.