There is an American movie about two brothers. What is it about?

"Dumb and Dumber" is a comedy film directed by Bobby Farrelly and starring Jim Carrey.

The film tells the story of the jokes between a pair of stupid buddies, Roy Christmas, played by Jim Carrey, and his best friend, Harry Dunn, played by Jeff Daniels.

Plot:

Roy Christmas (played by Jim Carrey) and his friend Harry Dunn (Jeff Daniels)

Yes A pair of stupid buddies. Not only do they have low IQs, but they can't find a job. Once, Roy got a temporary job and drove the modern girl Mary Swanson (played by Lawn Holly) to the airport. He fell in love with Mary at first sight, but the two identities were very different. When Mary boarded the plane, Roy found that Mary had forgotten a suitcase in the airport terminal. So, in pursuit of true love, Roy decided to drive with Harry and asked Mary about it. As the plane approaches its destination, he not only wants to return the suitcase, but also wants to pursue Mary. But the suitcase seems not to be that simple. A group of gangsters are eyeing the suitcase and trying to put Roy and others to death. Roy's IQ is unknown. Can the two idiots reach their destination through a strange combination of circumstances? A silly and happy journey begins.