When Wayne and Julie give Bess a 'Hot Lap' - a ride in a V8 Supercar, to make up for all the birthdays they've missed, Bess is shocked to discover that she is a natural behind the wheel of a very fast car.
Bess, Danny, Margaret and the kids arrive at a dingy motel for the Drag Racing Championships. Danny is cross because Bess has cancelled their anniversary weekend away to be here but Bess really wants to support Team Wheeler.
Wayne is forced to take a driving test because of his glass eye. When he fails the reverse park component of his test, Wayne is crushed. So when Bess asks him to help her with a bullying surgeon at work, he jumps at the chance.
While Bess is thrilled that her two families are coming together, when Danny finds out that Shawn and Edwina have skipped school and gone dirt bike riding, he freaks out, jumping to all sorts of wrong conclusions.
After a TV news story about the Wheelers paints Julie as an old woman who is past her use by date, Julie decides she won't race anymore and, reasoning that she's the only driver, sells the dragster to help the family get out of debt.
Bess is cross that Margaret is not taking her diabetes seriously and refusing to exercise, so when Brianna becomes a qualified fitness instructor, she sees an opportunity to help both her adoptive mother and her older sister.