In a small town, an auto mechanic named Benny is devoted to taking care of his mentally ill sister, Joon, who can barely function alone in the real world despite being a talented artist. This relatively stable situation is shaken up when Benny is obliged in a poker game to welcome another player's relative, Sam, to his home for a few days. When Sam arrives, he quickly makes an impression with his quietly eccentric ways which emulate the antics of the great silent movie comedian, Buster Keaton....

Samantha's life is going downhill fast. The fifteen-year-old has a crush on the most popular boy in school, and the geekiest boy in school has a crush on her. Her sister's getting married, and with all the excitement the rest of her family forgets her birthday! Add all this to a pair of horrendously embarrassing grandparents, a foreign exchange student named Long Duc Dong, and we have the makings of a hilarious journey into young womanhood.