Seventeen-year-old girl Lu Jiajia transmigrates into a cannon-fodder supporting character in a book, facing the fate of being deceived by educated youth Zhou Wenqing, the family suffering misfortune, and herself dying a miserable tragedy. She decisively cuts off the bad affinity, and shares knowledge and keeping each other with Xue Yan, who once saved the original owner. With Xue Yan's support, Lu Jiajia seizes the opportunity of the restoration of the college entrance examination to be admitted to university, changing the family's destiny step by step. The couple joins hands to start a business, raises children, walks from the seventies to the new century, and uses a lifetime to prove that sincerity and hard work are enough to rewrite destiny, and ordinary guarding is the deepest happiness.