Yana Yawner, the Divine Doctor, was determined to fulfill her mother's last wish and become a grandmaster by studying the Poison Manual. However, the book was a treasured heirloom of the Gayton family, and the only way to get it to marry into the family and bear a child. Meanwhile, Zackery Gayton was desperately seeking the Divine Doctor for his adopted son's mysterious illness. The two got married out of convenience and, through a series of misunderstandings, gradually understood and fell in love with each other, living a happy life ever after.

In his previous life, Felix Quick was neglected by his family and killed by his foster brother Harold. Before his death, Felix felt disheartened by his family, but when he woke up again, he found himself back on the day of his twelfth birthday, ten years ago. At the age of twelve, Felix was adopted by the Quick family, thinking he finally had a family, only to realize that they valued another foster son, Harold, much more, leaving him with only coldness and misunderstanding. In his previous life, Harold falsely accused Felix of adding an allergenic jam to the cake. This time, Felix did not deny it; instead, he cut ties with the Quick family on the spot and ran away from home.

Lana Cole and Gary Leed have been searching for their missing daughter for over 20 years. Tragically, Gary loses his life while working at a construction site, trying to earn money to find her. Unbeknownst to them, their daughter has been adopted by a wealthy man, growing up into someone they no longer recognize.