After three years of marriage, Song Fan's life in the Su family was worse than that of a dog. His mother-in-law smashed his anniversary gift and called him a "soft-fed loser"; his brother-in-law poured red wine on him and asked him to polish the shoes of the rich second generation; even Su Qingyue, his wife who had promised him a lifetime, was as cold as ice to him.
No one knew that this adopted son-in-law, who was ridiculed by the whole city, hid a secret that could subvert the world - he could "eat knowledge." After swallowing "Project Management Practice", he backhandedly exposed the conspiracy of the competing product director and saved his wife's project; after chewing "Basics of Sanda", he subdued his arrogant brother-in-law with three tricks and silenced the entire audience; after chewing "History of Chinese Ceramics", he pointed out at the tasting meeting that the sky-high-priced Song porcelain was imitation, helping the Su family win orders worth tens of millions.
From rescuing people at work to breaking up in life, from repairing transformers in the community to rescuing his father-in-law who had a heart attack, Song Fan relied on the skills unlocked by "swallowing books" to slap those who despised him in the face again and again. But with the awakening of abilities, a mysterious organization called the "Book Burning Society" came to the surface to hunt down the "Guardians of Letters" - they killed Song Fan's grandfather, coveted his abilities, and even attempted to destroy all human knowledge.
In order to protect the people he loved and to uncover the truth about his grandfather's death, Song Fan was forced to transform from a "clumsy son-in-law" into an "all-round warrior". He devoured ancient and modern classics, unlocked the ability to swallow electronic texts and hidden symbols, from cracking network security to repairing thousand-year-old cultural relics, from seizing treasures in the deep sea to decisive battles in the Arctic. And Su Qingyue also went from being cold and suspicious at first to fighting side by side. In the face of the crisis, the two rediscovered their lost love.