The cast members are introduced through an interview with 3 variety show masters from 1 Night 2 Days, and meets each other for the first time. Kim Sook is chosen as the first dreamer, and her dream is to be a tour bus driver. The members divide into two teams, one to get the license (Kim Sook, Jessi, Tiffany) and the other one to find a mentor for learning to drive (Ra Mi-ran, Hong Jin-kyung, Min Hyo-rin).

Both teams proceed with their assigned task, and Jo Se-ho comes to inform them about road safety.

The members go to MT as proposed by Kim Sook, and chooses the second dreamer. During the trip, the members are fulfilling their wishes as well as the rule. Min Hyo-rin is the first to get her wish, which is to do a makeover for the older sisters. Kim Sook gets her wish to eat alone, and Tiffany gets her wish to visit an amusement park.

The sisters arrive at the dorm and spends the night playing games getting to know each other. The following morning, Jessi gets her wish to try bungee jumping.

Min Hyo-rin is chosen as the second dreamer. Her dream is to debut as a girl group member and they get help from JYP as the producer.

The members visit KBS Music Bank and have battle with TWICE members through games. They also hear the completed song for their debut, "Shut Up". Afterwards they visits I.O.I and have talks regarding debuting as girl group from different agencies.

Kim Sook & Jessi are taking the exam for the bus driver's license. The sisters also work on the second dream and get their girl group name.

JYP teaches the girls the choreography for their debut song. They also get their personality checked through MBTI test, and celebrate Tiffany's solo (I Just Wanna Dance) at KBS Music Bank.

With Tiffany missing through a concert schedule with Girls' Generation, the rest of the girls work on the singing and choreography for their song. Ra Mi-ran and Kim Sook consult with Jo Kwon and Yenny. Min Hyo-rin and Hong Jin-kyung consult with Kim Tae-woo, while Jessi is working on the rap.

The first recording for the song, and more work on the choreography. The members also decides on the costumes and makeup style.

The recording continues for the chorus and rap part, but Hong Jin-kyung still struggling with her part which makes her stays longer at the studio while the other members perfect the choreography. After the recording, Min Hyo-rin invites the members to her house.

As debut date is getting near, the members work harder on the choreography. Later Bada & Shoo from S.E.S visit them to give tips on debuting as girl group.

The shooting of "Shut Up" music video with guest starring Kim Joon-ho as Min Hyo-rin's boyfriend and Yoo Hee-yeol as Min Hyo-rin's previous boyfriend.

The shooting continues with several cameos appearance.

The sisters go for a trip to relax and open up to each other.

The Unnies finally debut live at Music Bank (while still maintaining their #1 rank at online music charts). The second dream comes to an end and the members present a gift to Park Jin-young as they bid farewell.

Jessi is chosen as the third dreamer, choosing to learn boxing. But after starting this dream, she discovers that the other members' prepared a surprise with the crew: her real dream is to spend time with her parents who live abroad, and complete three tasks chosen by her father.

The three tasks from Jessi's father are revealed: one related to the past by playing basketball together; one to the present, seeing Jessi perform; and one to the future, organize a pretend wedding.

The sister's fufill the two first tasks, and start to organize the wedding.

Jessi's pretend wedding is a success. The fourth dreamer is chosen as Hong Jin-kyung, whose dream is to host her own television show.

The members then tell Jang Jin of Hong Jin-kyung's idea for her dream of a Hong Jingyeong Show. The members start brainstorming to find ideas for the show with each member asking for advice from several people. The members then present their ideas to Jang Jin, with the director deciding Jin-kyung's idea of environmental awareness in regards to health & well-being as the best theme for the show. The members then meet up with "Speech Dart" professor Kim Hyun-ah to help them in their speech as TV presenters for Hong Jin-kyung's dream. The PD then announces that the volleyball player and Olympic competitor Kim Yeon-koung would be a special guest and a "dreamer" for several episodes.

The members meet up with athlete Kim Yeon-koung, who stated her dream to be a rapper. Due to only having a week to prepare, they will be aided by "teachers", which is revealed to be Lee Sang-min (former member of Roo'ra) & rapper DinDin. The members then head out to eat at the restaurant when they began the girl group project and surprise Kim Yeon-koung with the presence of her fellow 2016 Olympic volleyball teammates. The members then try to fulfill her special dream of being a rapper.

The members meet up with Dynamic Duo and start practicing (under 10 hours) for their stage performance: a modified version of one of their well-known tracks, "Friday Night" at a well-known club at midnight.

Jang Jin then decides on the format of Hong Jingyeong Show: a movie with a fake documentary format, which he plans to enter in a film festival. The members do camera-recording trials with Jang Jin and are tasked with finding material for the show. The members then find out where their recycled trash goes to, and do a debate on protecting the environment.

The members measure the fine dust level within their surroundings while doing their own efforts in protecting the environment, from recycling to DIY eco-friendly products. The members then meet with former politician-turned-writer Rhyu Si-min in regards with Hong Jin-kyung's ideas. Jang Jin and the members then start shooting Hong Jingyeong Show's first scenes inside Seoul City Hall, with Jessi as the holder of the boom microphone. Jang Jin then informs the members that he plans to include their work in the 14th Asiana International Short Film Festival (AISFF), where they have to convince the film festival chairman Ahn Sung-ki.