Original Webtoon:
Comico, Ridibooks, KakaoPage, Bomtoon, MrBlue, Naver Series

[How a girl saves herself in the world]

The earth collapsed and the 'land' disappeared, but unfortunately, humanity was not extinct.
This is because the military company "North" created a so-called "ark" and burned people-accurate labor forces- to endure a series of disasters.
The surviving people were exploited by labor to suit North's taste, and lived a rough life in it.
A life in which dozens of people are raped and killed in a lump of bread and hundreds of people lay down in one room...
The place where the ark reached was hell, not paradise.

Kim is a 15-year-old girl born in Ark and living in Ark.
Mom dies, and she doesn't know who she is. What Kim was given is an old photo, an off electronic watch, and a 'special ability'.

Like his mother, who was a diver, one day when Kim was making a living as a diver, suddenly,
There is an opportunity to save the fate of Arkju and his future.