Tumbleweeds: Whenever trouble strikes in one of her relationships, single mother Mary Jo Walker and her daughter, Ava, pack up and move to another city, a routine Ava is tiring of. This time, they are helped on their move to San Diego by trucker Jack Ranson. While Ava settles in, getting a leading part in the school play, Jack starts dating Mary Jo but soon reveals himself to be controlling and aggressive. Mary Jo prepares to flee again, angering Ava.