Benny runs a car repair shop, and is having trouble keeping a housekeeper to take care of his mentally disturbed sister Joon. Without supervision she tends to set things on fire and create public disturbances. One night they lose in a poker game and have to agree to take in a friend's cousin, Sam, who also has some erratic personality traits. When Joon and Sam begin falling in love, Benny must deal with his feelings about not being needed as much by his sister, and about his plans to put her in a group home.