Finally

"Okay since we now know how it all started let's go back to the rooftop and yeah, how about we try calling Byeong Ho's mom again, let's ask her if she has spoken to a member in the rescue team." Geu Roo suggested.

 "Then if hopefully she has spoken to one of the rescue team member then we can show them the bottles and they'll do some research about it after they've rescued us." Ji Hye said with a nod.

"Let's go now." Da Eun said they left the room. Just like the first time, they were able to pass easily with the help of Byeong Ho. 

 Getting to the rooftop, Byeong Ho called his mom and in a few rings, she picked up.

"Mom?" Byeong Ho called.

"Oh my dear, how have you been?" Byeong Ho's mom asked worriedly from the other line.

 "Mom, have you talked to the rescue team?" 

"Yes my dear and they are on their way there right now so just hold on a bit, okay?" 

 "Okay mom, thank you." 

"Anything for you dear, I'll hang up now." She said and hung up.

"What did she say, have she talked to them?" Ji Hye hurriedly asked.

 "Yes, she said they will be here anytime soon." Byeong Ho answered.

Few minutes later, they heard the sound of a helicopter.

 "I think that's a helicopter, they are here, finally." Geu Roo said In excitement. "Let's shout for help, so that they can easily find us here." 

 "Help!!! Help!!!! Help!!!." They all chorused except Byeong Ho who was already weak.

The helicopter finally got to where they were and a member called out.

 "Hey kids, come here." 

They ran happily to where the helicopter stopped.

"There is not enough space for the six of you, we can only take five." The man said.