When repairing the back door of an old house, Lin Qiwen of modern times accidentally time-travels, becoming a poor scholar in ancient times who repeatedly fails exams, while also carrying three children. Relying on his daughter Lin Miaomiao in modern times to transport supplies, exam questions, and poetry, he stages a counterattack and passes the Xiucai, Juren, and Tanhua exams. Father, daughter, mother, and sons transmit supplies to each other through the two-world passage, repeatedly resolving the framing of his rival Zhou Ziqi. Mother Lin accidentally unlocks the ability to time-travel, and the family travels back and forth between ancient and modern times. Lin Qiwen serves as an official in ancient times to promote high-yielding crops, and the whole family rushes towards each other in both directions to harvest wealth and a fulfilling life.