The family discovers an amazing tamale cart and tries to keep it a secret from Abuela.
Rosa is in the kitchen, making taquitos. However, Rosa refuses to let the family eat any food before dinner. As the family (except Rosa) hangs out at the park playing with a soccer ball, Ronnie Anne is seen eating a tamale from a food truck nearby. The family is initially horrified, since she would have to endure Rosa's wrath if she ever gets caught eating someone else's food. However, after taking a bit of Ronnie Anne's tamale, they end up loving the food.
Sometime later, as the family hangs out in the secret hideout, the family can't stop thinking about how good the tamales were. Ronnie Anne says that she has an idea on how to acquire tamales without Rosa noticing. Ronnie Anne explains to her family Rosa's daily schedule, which includes cooking from 7 to 8 AM, building/repairs from 10 AM to 2 PM and laundry from 3 to 4 PM, and deduces that they hit the tamale truck during building/repairs, since she'll be the most distracted during that time. At 10 AM, Rosa is about to do some repairs, and the moment she leaves, the family immediately head to the tamale truck. As they place their orders, Rosa unexpectedly arrives, forcing the family to retreat.
The family concludes that it's too risky for all of them to go the truck together, so they decide that while one would get the food, everyone else will be surveillance, spying on Rosa in case she comes close. During the first attempt, the family fails to get the food because of Rosa arriving too close, and the truck relocating to the apartment building, right in front of the window Rosa is in. This prompts the family to come up with various distractions to keep Rosa away from the window, and despite some close calls, the family succeeds in getting the food.
As the family eats their tamales, they are suddenly caught by Sergio, who threatens to tattle on them. Now wanting to be tattled on, the family says they'll do anything to keep Sergio quiet. This prompts Sergio to come up with the idea to have them cater to his every whim, ranging from getting him things from infomercials to being his servants. Tired of serving their pet bird, the family plans to trap him in a crate to send him to Peru. However, the plan to do so results in chaos that results in Rosa seeing the chaos. Realizing they're caught, the family confesses that they were sneaking to a tamale truck to eat. However, Rosa laughs, saying that the tamales they were eating was actually her recipe. She explains that the woman who runs the tamale truck's husband owns the tool store she visits, so in return of getting endless discounts at the store, Rosa gave the truck owner her tamale recipe. As for Sergio, Ronnie Anne comes up with the perfect plan to get revenge on him.
As the family eats on the building's rooftop, the family decides to make Sergio their servant as punishment for blackmail.