The beginning of the story is in the form of flashbacks, which starts with a few gray-haired old people on TV reminiscing about the past and the dusty days when plates and cups had to be inverted to prevent the sand from entering.
The timeline goes back to that era next.
The main character, Cooper, is piloting a spaceship that suddenly malfunctions and is about to plummet. In this moment of crisis, Cooper woke up and realized that it was just a dream. At that moment, his daughter, Murphy, comes to his bedside and tells him about the ghosts, but Cooper doesn't take it seriously.
Cooper was an engineer and an astronaut, but now that there is a food shortage and the country doesn't need engineers and astronauts, he becomes a farmer. Many crops are suffering from blight, and Cooper's family's corn is spared. Cooper's family has a son and a daughter, son Tom, daughter Murphy, and his father-in-law, his wife has long since died because of the shortage of medical equipment and did not catch the disease in time.
While the family was eating breakfast, the father-in-law told Cooper that Murphy's teacher wanted him to go to school. So he drove his son and daughter to school. On the way the car gets a flat tire and they stop to fix it. That's when Cooper sees a long-abandoned drone, and he excitedly drives over a large cornfield to go after it. Eventually, the drone lands, and Cooper removes the drone's batteries to use on the farm.
Arriving at school, Cooper is furious to learn that his son won't be able to go to college, and a teacher at the school tells him that farmers are exactly what's needed right now, because everyone needs food. And the teacher wants to suspend his daughter for a few days because she's fighting with her classmates over whether the U.S. moon landing was real. This also makes it hard for him to know that his daughter is right, even though the textbooks have been changed, making many people disbelieve that there was ever a moon landing.
Cooper decides to take his daughter to her favorite ball game. While watching the game, a sandstorm comes and everyone rushes to escape. When they get home, his daughter and he notice something strange; the sand on the ground forms Morse code that unravels to a coordinate, which he blames on gravity.
He decides to go and see the actual location of this coordinate for himself, and his daughter wants to go too. Although Cooper won't let him, the daughter goes along.
They find the place and at first get arrested. Then the misunderstanding is cleared up and it turns out to be a new place for NASA, where he also meets a familiar face, Professor Brand.
The Earth's environment is deteriorating, and the group of scientists decide to send someone to find a new habitable planet. They sent twelve scientists, led by Mann, ten years earlier, who passed on data on habitable planets, and now they need someone to scout them out. Cooper agrees to their plan.
Knowing that Cooper is leaving and does not know when he will be able to come back, his daughter is very sad, and in the prompts left behind by the ghosts also show that they stayed, but Cooper still chose to leave, and if he does not, his daughter and the girls may be the last generation, and he is trying to rescue his family. Professor Brand's daughter Amelia also went, and Professor Brand stayed on Earth to continue his research.
After getting on the ship, it left Earth and docked to a space station in space. The space station takes them along for the ride.
At first, Cooper and his family also pass video, because the distance is too great for instant communication. While his son and daughter on Earth are growing up, he's on the ship and, because of the faster speeds, is not getting older.
While traveling through the wormhole, they also encountered people from the fifth dimension, and Amelia reached out and touched.
After traveling through the wormhole, they had three options. They decided to go to the closest one first, and the data coming from the planet was good.
When they arrive they realize that time passes slowly here, one hour equals seven years on Earth, and there's water everywhere, and worst of all, because of the huge external gravitational pull, a huge tidal wave comes through at regular intervals, and the first astronauts to arrive here died because of it. Amelia tries to go get the data back, but the tide is already coming in, and Cooper tells the robot to save her. But their companions are swept away by the waters.
After the rescue, they return to the station again, and there are only three of them left. They vote on which planet to go to, and Amelia and Cooper disagree, with Cooper feeling that Amelia is being overly sentimental because she's choosing the planet where her boyfriend is, when clearly the data on the planet he's chosen shows it's more habitable for humans. In the end Cooper wins.
The trio arrive at the planet, which is very cold and white everywhere. They found the dormant scientist Mann and woke him up. At this point, Cooper's daughter Murphy appears in the video and informs about the death of Professor Brand, Cooper then realizes that there is no way for them to save the humans on the planet and decides to return to Earth. The situation changes suddenly, it turns out that Mann's data was faked, it is not suitable for human habitation, he does not want Cooper to return to Earth, he wants him to die here, he went to the third planet himself.
Cooper had his mask destroyed by Mann and was having trouble breathing in the freezing cold. Luckily, Cooper picks up the communicator that Mann threw aside and Amelia comes to his rescue. Another scientist was working on the broken one, but that robot was killed when Mann broke it on purpose and programmed it to blow itself up if turned on.
Mann took off in his ship and the two men gave chase. Mann tried to dock the space station, he didn't have permission and chose to dock manually, not docking completely and causing an explosion. Meanwhile, the space station was affected by the explosion and gradually fell.
In the nick of time, Cooper has the robot perform the docking, saving the station from crashing. Because there was not enough energy left, Cooper chose to let Amelia go to the third planet alone, taking the robot Kes with her. He took the robot TARS to act as a thrust to send Amelia to that planet.
Just when Cooper thought he was going to die, the fifth dimension saved him. He saw his daughter from the past in the fifth dimension and tried to stop his then-self, which he eventually realized was futile.
He realizes that the fifth dimensional man chose not him, but his daughter. What appears before his eyes is his daughter from multiple time periods.
In the end, he uses Morse code to transmit the answer to his daughter, who also discovers this, thus solving the puzzle.
After this is done, the fifth dimension disappears. Before disappearing, he also touches Amelia from before.
Waking up again, Cooper found himself lying in a hospital. It turns out that this is a new space station. His daughter has cracked the puzzle so that humans are able to live on the station in large numbers. Later he also meets his gray-haired daughter. The daughter doesn't want Cooper to see her die, so she tells Cooper to go to the planet where Amelia is.
Amelia reclaims the planet, she takes off her helmet and breathes in the new air, and humanity has finally found a new planet.
The movie paints a fantastical picture with science mixed with fantasy. The affection between Cooper and his daughter, they are equally stubborn people, Cooper in order to save his daughter insisted on embarking on the cosmic voyage of no return, the daughter because of her father's departure and angry for several years not to contact her father. Cooper and his son's affection, the son because of his father's words, insisted on guarding the farm for the rest of his life, even though his wife and son are suffering from lung disease, but also unwilling to leave, and finally or Murphy to come before they took them away. Amelia and Prof. Brand, Prof. Brand knows that there is no way to break his formula, but still chooses to let his daughter leave the Earth and go to a new planet to create hope, while Amelia does not know the truth and steps into a journey that does not know how many dangers it hides. ?