The newlyweds of Carl (Matt Dillon Matt Dillon) and Molly (Kate Hudson Kate Hudson) are about to unfold when an uninvited guest arrives: Carl's old friend Dupree (Irving Wilson Owen Wilson). This guy behaves strangely, thinks strangely, and has his own lazy way of life. Now that he was out of luck, he was fired from the company and then became homeless. The kind-hearted Carl took him in and didn't mind the trouble Dupree brought to his newlywed life. The madness of Dupree's life has become unbearable for Molly, and the almost absurd farce of life has seriously affected the quiet life of the couple. However, unexpectedly, Dupree got along with the neighbors, all of whom were infected by his character. On the contrary, Carl's work is so busy that he spends less and less time on his family. So Dupree is more like the man here. Not only the neighbors, but also Molly, gradually fell in love with the light bulb. The dilemma of three people living together has to be solved.