So, Dave is a movie about a regular guy named Dave who looks exactly like the president of the United States, who is also named Dave. Dave gets asked to pretend to be the president while the real president is sick in the hospital. Dave is really good at pretending to be the president, and he starts making changes to help people, like giving more money to schools and helping homeless people. Dave also falls in love with the first lady, who is married to the real president. Eventually, the real president dies, and Dave becomes the permanent president because he was doing such a good job. The end!