An odd couple of sorts, meditative and stern Alvin and his girlfriend's brother, Lance, dopey and insecure, leave the city behind to spend the summer in solitude repainting traffic lines down the center of a country highway ravaged by wildfire. As they sink into their job in the remarkable landscape, they learn more than they want to about each other and their own limitations. An unlikely friendship develops through humor and nasty exchanges, leading to surprising affection.