Who can help me explain what interstellar said?

The climate of the earth is no longer suitable for food growth. At this time, scientists discovered a mysterious "time-space gap", and water resources were exhausted. When crossing the wormhole, their goal is to find a planet suitable for human migration. An expedition crossed the solar system. On this spaceship named "Endurance", even if the task of the expedition team can be completed, the human mind will face unprecedented challenges, and the expedition members will also face unprecedented challenges. However, they found that an hour on the spaceship was equivalent to seven years on earth, and there was famine and plunder. The pilot Cooper (played by Matthew McConaughey) must choose between reuniting with his children and saving the future of mankind that is threatened with extinction and beyond the limits of human space travel.

The film takes place in the near future, and the rescue they can provide is too late for the living people on earth, so they begin to travel in the vast universe, and through these trips, they can find opportunities to continue the hope of life in outer space. The film tells the story of a group of explorers using their new discoveries about wormholes.