HaSeul’s first episode and she is at the airport, ready to depart for Iceland to film Let Me In, she is so happy to be debuting. She copies HeeJin’s silly pose from the first episode.

HaSeul tells her back story of becoming the third member – she struggled during her audition and did not do well with the choreography part. She cried afterwards and her friends consoled her but the manager announced that she would be the next member and then she cried even more!

HaSeul is about to board her flight – 12 hours to Amsterdam and then 9 hours layover followed by another 3 hours flying! After 26 hours, she finally arrives in Iceland.

Everyone is nervous about the weather in Iceland, after leaving the airport, HaSeul experienced Iceland’s wind and preview scenes are shown of the extreme weather in Iceland while filming Let Me In.

HeeJin and HyunJin are at back at the airport, about to board a plane to London to meet up with HaSeul after she finishes filming in Iceland, HyunJin says HaSeul has a lovely voice.

HeeJin and HyunJin are waiting at the airport for HaSeul, it took 12 hours to fly to Amsterdam and then 3 hours waiting for their connecting flight so the girls are anxious to join up with their third member.

Filming for Let Me In is underway, HaSeul has become a man (BoiSeul) and she says she is not cold and it doesn’t matter because she will debut soon. HaSeul works hard to film scenes as BoiSeul despite the weather and she is determined to do a good job because there are so many people on set to create the MV.

Filming for Let Me In continues, HaSeul is now a girl again and later becomes a penguin. “Do you know how the penguin cries? Peng Peng?” The crew move on to a new location to continue filming.

The first day of filming Let me In is complete, the crew travel to their hotel but two of the cars stop on the way because of a flat tire so HaSeul hitches a ride with the wardrobe team in their van.

HaSeul says that there is a seal outside but she can’t go and see it because she is busy getting her hair and makeup done. A crew member asks her if she wants to get an umbrella and go outside to see the seal so HaSeul is happy. She spots two seals in the water.

The second day of filming has begun and it is raining a lot in Iceland, HaSeul is struggling to move naturally because of the cold weather. She keeps her spirits up as the team continue filming.

Filming for Let Me In has finished and HaSeul is at the airport ready to go to London. HeeJin and HyunJin have been waiting for 3 hours to see HaSeul, HaSeul wonders where her babies are and can’t see them anywhere, HeeJin and HaSeul reveal that they were waiting at the wrong gate!

HeeJin and HaSeul have to take a train to reach the right gate, their manager asks “What if a handsome British man takes this train?” and HyunJin and HeeJin share a giggle. HaSeul has to wait 30 minutes for HeeJin and HyunJin to meet up with them because the terminals are so far apart but they finally reunite at the end of the episode and have a group hug.

HaSeul tries to open the van door by saying Open Sesame and the three girls head off to breakfast, HyunJin points out beautiful pigeons and HeeJin is shocked at her. The girls head to a Korean restaurant and enjoy noodles together, HaSeul claims that she ate the most.

HaSeul has become BoiSeul again, HeeJin claims it’s her older brother. The concept for HaSeul’s photoshoot is The Little Prince. HaSeul goes to change clothes and becomes a girl again.

HeeJin, HyunJin and HaSeul are doing a photoshoot in London and go to a Korean Restaurant, suddenly Vivid starts playing while they’re in the restaurant and the girls are surprised! HeeJin is happy but HyunJin was a bit sad that her song was not played.

Filming for The Carol has begun and the girls are shopping around London. The director buys the girls new sneakers.

HeeJin, HyunJin and HaSeul are doing a photoshoot around London and are very cold but HaSeul is happy that she has a hot pack which gives her positive energy.

The three girls want to go sightseeing around London, HyunJin spots some bread in a store. The girls get ready to go home to Korea as they’ve finished the filming they needed to do in London, they are excited for the audience to meet the fourth Loona member.