Plot

When a man is diagnosed with terminal cancer, he takes custody of his misanthropic teenage son, for whom quality time means getting high, engaging in small-time prostitution, and avoiding his father.

George Monroe (Kevin Kline) is a lonely and sad man. Divorced for ten years, he lives alone on the southern California coast with his pet dog in the same run down shack in which he has lived for twenty-five years, the shack which his father passed down to him. In the intervening years, ostentatious houses have sprung up around him. He's been at the same architectural firm for twenty years in a job he hates, which primarily consists of building scale models. On the day that he is fired from his job, he is diagnosed with an advanced case of terminal cancer, which he chooses not to disclose to his family. In many ways, this day is the happiest of his recent life in that he decides to spend what little time he has left doing what he really wants to do, namely build a house he can call his own to replace the shack. He also wants his rebellious sixteen-year-old son, Sam Monroe (Hayden Christensen), to live with him for the summer, hopefully not only to help in the house construction, but for the two to reconnect as a family. Getting Sam to do any of it will not be an easy task as Sam, who has embarked on some self-destructive behavior, would rather do anything than spend time with his family, which also includes his mother Robin Kimball (Dame Kristin Scott Thomas), her wealthy but emotionally unaffectionate husband Peter Kimball (Jamey Sheridan), and their adolescent children. In Sam, George sees an unhappy person in every aspect of his life, much like George was before that fateful day. What Sam decides to do for the summer may consider Alyssa Beck (Jena Malone), his pretty classmate and George's next door neighbor. Through the process, George also reconnects with Robin, who admits that she's made some pretty bad decisions in her life. He may not want that reconnection to go too far considering his health. Ultimately, George has much to do to complete all he wants before he dies.—Huggo

George Monroe, an architectural model fabricator, is fired when he refuses to use computer technology. At his boss' refusal to let George keep a few models, he destroys all but one of the models with a spindle from an architectural drawing. As he exits the building with the remaining model, he collapses and is rushed to the hospital, where it is revealed he has advanced stage cancer and any treatment would be futile.

George decides to demolish the home left to him by his father and replace it with a house in keeping with the neighborhood. He enlists his son, Sam, who is alienated from his stepfather Peter and his mother Robin. Sam must spend the summer with George, who has not revealed his terminal condition, and help him with the house, but Sam makes it a point not to help him. When George refuses to give Sam money unless he works for it, Sam toys with becoming a prostitute, but is nearly caught and flees from his first encounter. This leads him to steal George's Vicodin.

George slowly reconnects with Sam. Robin decides to assist as well, and she finds herself rediscovering George. Also joining in the construction are Alyssa, Sam's classmate who lives next door with her mother Colleen; local policeman Kurt Walker, George's childhood friend; Sam's young half-brothers Adam and Ryan; various neighbors; and eventually Peter, even after separating from Robin when she tells him that her feelings for George have re-awakened. George tells Robin of his disease, sending her into shock. George tells Sam, who is betrayed and accuses George of being selfish and takes refuge at Alyssa's house. George collapses and is found by Robin the following morning. Complications arise when neighbor David Dokos tries to halt construction because the building's height exceeds the allowable limit by six inches. His plans to halt the project are stopped by Sam, who recognizes him from his prostitution attempt and blackmails him.

Sam puts Christmas lights all over the unfinished house and shows George the gleaming house from his hospital window. The next morning, Sam returns to finish the house and Robin sits beside George until his death. Robin goes to the house and tells Sam about his father's death. Sam inherits the house he finished building. Sam gives the property to a woman who has been living in a trailer park. As a girl, she was injured in a car crash caused by his grandfather.