Abu Saad (Saad's father) wishes he could go back in time as he passes on his knowledge to those around him. His grandson asks him to explain a lesson to him about the history of the desert and its people, so he tells him some stories about the generosity and magnanimity of the people of the desert in the past.
Abu Saad travels to see Abu Abdul Rahman on his farm, and the latter advises him to return to work after his retirement so he wouldn't feel bored. Abu Saad tells his grandchildren how in the past people didn't feel safe in the Arabian Peninsula, while Noura gets upset at Nasser's neglect of her.
Sarah consoles Noura on Nasser's not paying attention to her, and asks her to wait for him until he returns from travel and finds out his feelings towards her. Kholoud suggests to Sarah opening literacy classes. Abu Saad tells Mishaal and Saleh how difficult the pilgrims' journey was in the past.
Mashael tells her grandfather that she is writing poetry. As Sarah's children get sick with influenza, the doctor tells their father, Saad, about this disease wiping out a large number of the inhabitants of the ancient Arabian Peninsula, where a type of it spread among the population.
Abu Saad accompanies his grandson Mishaal and his friends on a trip to the desert, where he tells them how harsh life used to be in the desert, how difficult searching for food was, and how the people of the desert used locusts in their food.
Abu Saad chides Abdul Rahman for treating an employee of his with special needs snobbishly. Sarah takes over the administration of the Institute for People with Special Needs and prepares to hold a party there, while Abu Saad tries to help Bandar receive the appropriate treatment for his condition.
Abu Badr is convinced by Abu Saad's advice to him not to travel frequently, and to take care of his children, and he tells him how traveling in the past used to take months, whereas with advancement it only takes hours now; meanwhile, Saleh asks for Noura's hand.
As Saleh designs the model school that Abu Saad wants to establish, Abu Saad suggests to him using the designs of old houses, as well as of old schools.
Abu Abdul Rahman invites over Abu Saad and his family, as well as Abu Badr's family. At first, Mishaal objects to the tasks assigned to him by his grandfather, but the latter tells him how strenuous work used to be in the past, especially the work of collecting firewood.
Abu Saad gets upset at Abu Saleh's suggestion to sell his farm so he could fund the school project, and tells him of the importance of the farm in his life. He also tells his grandchildren about the waterwheels and how they used to work in the past.
Saud betroths Kholoud. Abu Abdul Rahman tells his grandchildren how people used to live in the old days, sleeping on palm leaves, not beds, and he tells them the story of Abu Abdullah and how his wife neglected her children.
When a problem arises between Saud and Kholoud due to their different tastes, Abu Saad solves it. As Nasser returns from travel, everyone is surprised to learn he's married a foreigner, while Saleh feels that Noura still loves Nasser.
Abu Saad tells his son and Saleh about the importance of electricity, and how people used to use candles for light in the old days.
With the marriage of his son, Nasser, to a foreigner, Abu Nasser tries to fix the matter with Abu Saad; meanwhile, Abu Saad tells them about the old gatherings among families and what used to happen in them.
After Abu Saleh travels with his assistant to sell a plot of land, they lose their way in the desert, whereupon everyone searches for them and Saleh calls the police, who keep looking until they find them.
As Umm Badr goes into labor, Nouf takes her to the hospital, where she gives birth, while Abu Nasser tells everyone how women used to give birth without any help.
Nasser convinces his father to sell the farm to an investor so that he can export his goods, and Abu Nasser tells them how their blood mingled with the soil of the land, and how they cultivated it.
Nasser and Abdul Rahman begin implementing their new project, while Abu Nasser tells his grandson the reason why the palm tree is called "the aunt", and that it brings prosperity.
As Abu Nasser takes the foreign investor, Barkash, to the city of Al-Kharj to visit an acquaintance, he discovers that Barkash has dealt with his son before. Abu Saad tells his grandchildren that there were no sports fields in the past.
Abu Nasser discovers his son's marriage to Barkash's sister. As Abu Saad's grandchildren pass their exams, he promises to buy them an entire book collection, and tells them about his childhood, when he couldn't find anything to write on or read due to hardship.
Saad suggests that his father asks for a loan from the bank in order to finance his school project. At the bank, Abu Saad meets one of his students who works as a manager of the bank. Abu Saad tells his family how education used to be in the past, and why not all people were educated.
Abu Saad meets his new neighbor and tells him of the importance of caring for one's neighbors. He tells him how neighbors used to care for each other, what the current situation has come to among people, and how they shut themselves off now.
As the bank approves Abu Saad's loan to build the school, he begins to build it. Saleh marries Noura. Abu Nasser tells his grandchildren how they used to spend their free time, and how they were entertained with stories and tales.
Badr's wedding takes place, before which Saad asks him to do some medical tests. Abu Saleh tells them about how the parents in the past used to take care of girls when they hit puberty and about the stage of marriage.
Abu Saad stresses to his friend the necessity of seeking the help of the veterinarian to take care of his livestock on the farm, and tells him how they used to take care of livestock in the past.
Abu Saad tries to help his grandson, Hamad, choose another horse to participate in the competition, after his horse was injured. He tells his grandson how races used to be in the past, and how horses were the most important thing poets wrote about in their poems.
Abu Abdul Rahman talks about the importance of science in the development of his farm, and about the export of all his products. As Hamad tells his grandfather, Abu Saad, that he wants to go hunting, Abu Saleh tells them how he learned to hunt in the old days at the hands of his father.
Mishaal and Mashael prepare to travel abroad. Abu Saleh asks Abu Saad to intercede for him with his opponent and to settle an issue between them, upon which Abu Saad talks about the absence of courts in the past to settle people's problems, and how they used to resort to mutual consultation among them.
Abu Saad opens his model school, celebrates the opening with everyone, begins to receive students, and talks about school education in the past.
Abu Saad inspects the library of the model school, and is pleased with the great progress he has achieved. He narrates to his grandchildren the biography of King Abdulaziz Al Saud, his interest in science and research, and his many contributions to the development of the Kingdom.