With their unwavering passion for tacos, KKPP Foods once again embarks on a quest to find the ultimate taco place. Will Culinary Director Kyung Soo be able to find the best taco of his life there? On the second night of the trip, the members have their first expense settlement with the head office. After meticulously checking receipts, Auditor Woo Bin puts on sunglasses to gain the upper hand, but he soon encounters an unexpected problem. The next morning, the Teotihuacan hot-air balloon tour, one of CEO Kwang Soo's wishes, finally begins. While admiring the pyramids from the balloon, Kwang Soo suddenly flops down with a drawn face. What is wrong with him?

KKPP Foods, inspired by Guide Nan Do's recommendation to try a new menu, becomes immersed in a feast of diverse flavours and begins to guess the main ingredients. What is the mysterious brown sauce that makes everyone goggle-eyed? In the evening, the members prepare to depart for the new city of Cancun. However, KKPP Foods and the production crew engage in a heated argument over the flight schedule. Will they be able to board the flight to Cancun safely? On the third night of the tour, the time to settle the expenses comes again, Auditor Woo Bin eagerly takes out a zip-lock bag full of receipts. But after a fierce settlement, all there's left for them is a broken spirit. Will they be able to complete their tour as they planned?

With a suspicious glare from Director Doh, the KKPP Foods Expedition heads to a restaurant that was on the members' must-eat list. What is Kyung Soo's plan to go to the ceviche restaurant he wanted to try, without the older members' knowledge? The truth behind the day is finally revealed. The three members finally arrive at their accommodation in Cancun, but even before they can feel the excitement, they are met with a swarm of ants on the sink and ancient-looking toilet paper. Shocked by the unnecessarily eco-friendly accommodation, CEO Lee Kwang Soo ultimately asks the head office for additional funds. With mysterious videos and an expense report attached, they sent a tearful request in accordance with the head office regulations. How will it turn out?

On the way to Rio Lagartos, the KKPP Foods Expedition opens up a karaoke in the car. With Director Doh's passionate singing, Kwang Soo and Woo Bin's excitement explodes. What will Kyung Soo's ear-pleasing live performance be like? After arriving at Rio Lagartos, they fall in love with the surreal animals and perfectly pink flamingos. Soon enough, CEO Lee gets carried away and ends up bleeding. What is the scary thing that shocks everyone? After the chaotic night in their accommodation in Cancun, they set out for a new city, Playa del Carmen. Despite their tight budget, they carefully choose their new accommodations. What will their new place look like?

The KKPP Foods Expedition heads out to the open sea in search of the long-awaited whale shark, but all they find are rough waves and severe seasickness. An hour after departure, the whale shark is nowhere to be seen. Will the expedition team get to see the symbol of good fortune? After the whale shark tour, following CEO Lee Kwang Soo's ironclad rule of "If you want to lie down, do it when you're dead," the team bravely sets out for parasailing. However, they hear the shocking news that parasailing is cancelled due to the weather. Will Kwang Soo's dream of flying fail just like that? As the final settlement section for their Mexico expedition approaches, a mysterious 120-dollar receipt appears, the source of which remains unknown. What on earth is the receipt for?

The KKPP Foods Expedition finally arrives in Cozumel, a hidden gem in the Caribbean, but their accommodation is suddenly cancelled. They hold an emergency meeting and quickly search for a room available that day. What will happen to the expedition tonight? The next day, they enjoy a scooter ride along the picturesque coastal road in Cozumel. As they excitedly head towards a sunset spot, Kyung Soo's scooter suddenly stops. To make matters worse, rain begins to fall. Is KKPP Foods not allowed to enjoy romance? On the final night of the expedition, KKPP Foods and the head office employees begin a long-awaited cup game, with the team dinner bill at stake. After the fierce battle between Jun Wi, the senior accountant, and Woo Bin, the junior accountant, who will end up footing the bill?

The KKPP Foods Expedition is told to showcase what they saw, felt, and tasted in front of CEO Ko from the head office. With the report written after much trial and error, a strange tension hangs between the head office and KKPP Foods. And the briefing session begins, filled with excuses and laughter. After the presentation, an on-the-spot tasting session takes place to prove the expedition team's accomplishments. Director Doh is given the mission of recreating the taste of the tripe taco with 95 percent accuracy. Will Kwang Soo, a vegetable-washing expert, Woo Bin, who shows off his forearms while chopping ingredients, and Kyung Soo, the former cafeteria chef, be able to recreate the taste of the tripe tacos they enjoyed in Mexico? The final journey of the KKPP Foods Expedition is finally revealed.