Jewelry designer Lin Jianqing returned to China with a wedding ring that she had not given away seven years ago. She just wanted to put an end to this regret of youth, but unexpectedly met her former lover Shen Si, who has become a technological upstart, at a bidding fair. Shen Si was cold on the surface, but he forced her to stay by his side with harsh terms of cooperation. As they were forced to get along day and night, the deep emotions and misunderstandings between the two gradually came to light. However, Shen Si's plan to acquire Lin Jianqing's company surfaced at the same time, as did a legendary diamond design "Tears of Time" involving the old grudges between the two companies, turning the reunion into a dangerous game mixed with interests and calculations. When Shen Si's business rivals use the truth about their breakup as a bargaining chip to try to defeat him completely, Lin Jianqing must make the final choice between protecting the love in front of him and defending the family inheritance. The answer lies in the ring that was never given away.
