On a stormy night, Gu Chengyuan's black Maybach smashes through the convenience store window where Shen Zhiyi works. Soaked to the skin, the young woman pries open the buckled car door with her bare hands, only for him to shove her against the airbag. "Is this some new scam?" Five years later, the newly appointed executive assistant to the Gu Group's president shatters a coffee cup at a board meeting. Brown liquid snakes down her suit, worth tens of millions. The man grips her chin and sneers, "Secretary Shen, how much are you planning to extort this time?" The night he forces her to sign a prenuptial agreement, he personally slips a diamond ring onto her ring finger. "Remember, you're just a tool for securing the Gu family's inheritance." It isn't until Shen Zhiyi finds a faded still from the convenience store's security footage in the safe that she sees the words written on the back in firm strokes of a fountain pen: "My ribs are finally back in place." When her leukemia diagnosis and a decades-old scandal involving a wealthy family are exposed at the same time, Gu Chengyuan snaps an antique fountain pen worth a fortune in front of the reporters' cameras. "Now it's my turn to be your tool." In the contest between a rising financial tycoon and a fallen heiress, the deadliest bargaining chip is the shard of glass she took for him in that car accident when they were young. It has long since traveled through his blood and become part of his heart.
