For three generations, the Yu family has worked in water conservancy. Yu Heqing, a descendant of the Yu family in the new era, resolutely chose the same path as his forebears.
Yu Heqing: Seriously, seventy of my eighty college choices were water conservancy. Did I have any options?
Yu's father (waving his hand): Nope!
A model young water conservancy worker from the new era, Yu Heqing encounters a flood during summer fieldwork and gets tricked by a river ghost. After dying, he transmigrates into an unfinished book about a tragic romance between women, and gets bound to a System. Now he must cultivate immortality while trying to survive and find his way home.
System: The original source material for this book was a romance novel. After the female lead transmigrated into a book, she refused to accept her fate. She overcame countless hardships, ascended to immortality, and married another female lead.
Yu Heqing: Seriously, my lesbian friend is amazing!
System: The current ending has the two getting married. After the transmigrated female lead drinks the nuptial wine, she is poisoned to death.
Yu Heqing: Seriously, that's tragic!
System: The transmigrated female lead will be reborn. Our mission is to create a happy ending for everyone!
Yu Heqing: Seriously, the original female lead is definitely straight. My friend has it rough. She should find another girl to like, and let the original male and female leads get together. Then we'll be safe.
System: I urge you... I urge you to just do whatever makes you happy.
As he cultivates immortality and searches for the reborn female lead, Yu Heqing suddenly discovers that his own elder brother, Yu Haiyan, is the male lead whose love is stolen from him, while his considerate cousin, Pei Huan, is the original story's aloof female lead, who serves the poisoned wine.
Yu Heqing: Seriously, now that's something! Everyone around me is a major character.
System: Guess who you are?
Yu Heqing: Seriously, who am I?
System: You tell me.
Yu Heqing: Seriously, then I must be...
Yu Heqing: ?
Theme: Loyalty! Integrity! Responsibility! Science! Seeking truth! Innovation!