Vanessa and Monty bring their warring fathers, Doof and Monogram, to a "meet the parents" dinner.
Plot[]
Phineas and Ferb spend the day doing chores using drones they invented to help around the yard. Buford asks for their assistance untangling a massive ball of Christmas lights accumulated by his Uncle Oslo, and the boys repurpose the drones to organize the lights. They decide to use them to put on a nighttime light show.
Meanwhile, Vanessa and Monty plan a dinner date with their fathers, even bringing over Norm and Carl. Despite Vanessa's plea for good behavior, Doofenshmirtz secretly installs his latest invention—the Tableturn-inator—at the restaurant, designed to spin the table toward him so he can get the best food.
At O.W.C.A. headquarters, Major Monogram invites Agent P to join him at dinner, not realizing that Doof will be present. The restaurant, The Fork of Destiny, becomes the site of escalating tension as Doof and Monogram meet each other and realize their kids are dating each other behind their backs. The situation deteriorates into a childish argument over who sits in the red chair (which controls the inator), leading to food fights. Eventually, Perry admonishes both Doof and Monogram for their behavior, but this causes another argument as the inator shorts out.
The inator causes the restaurant to spin uncontrollably and lift into the air. Perry ultimately disables the inator and brings the restaurant safely back down. Doof and Monogram reconcile temporarily, admitting they were both in the wrong, and reaffirm their rivalry by shaking hands as enemies while agreeing not to interfere in their kids' relationship. A relieved Vanessa and Monty then continue on with their relationship, agreeing that they genuinely like each other despite the chaos. When Doof is given the bill, which includes damages to the restaurant, he tricks Monogram into paying for it while escaping, much to Monogram's frustration.
Back in the Flynn-Fletcher backyard, the drone light show dazzles the gang, featuring projections of Ducky Momo, Abraham Lincoln, Mona Lisa, and Perry. When the kids leave, Candace seizes control of the drones to spell out "We’re busted!" in the sky, but the airborne restaurant crashes into the drones before she can show her mom, who was about to see the climax of her movie. When Linda looks outside, she sees only the moon, leaving Candace defeated once again as they go back inside.
