In the winter of the 1960s, brothers and sisters Su Jin and Su Xiaoxiao in Sujia Village suffered a sudden family change. Su's father disappeared mysteriously, and Su's mother became ill and bedridden after giving birth to twin brothers. The family of five was on the verge of despair in a dilapidated thatched hut. At the critical moment, Su Xiaoxiao's blood accidentally activated the Chaifangmen statue, opening the door to modern time and space. The brother and sister traveled back and forth between the two worlds, first picking up defective fruits and vegetables from modern markets to satisfy their hunger, and then collecting scraps in exchange for money to buy supplies. With the help of kind-hearted people, they shouldered the burden of the family, improved their lives while looking for their father, and supported their family in the gap between the two worlds.
