A long time ago, the first creatures of the universe decided to create a massive world, The World Dungeon. The objective of that world was to find the best species of the cosmos in order to lead the universe to a new age.

When some suspicious objects landed on all continents of Earth, humans were immediately teleported to the first floor of the world dungeon. Separated into hundreds of thousands of groups that mixed together all people over the world. Everyone received a basic skill and a system that would make them stronger according to the type of person they were. Even before they could see what lay ahead of them, many had already died due to the panic.

Andrew and his friend Ann were luckily teleported together to the same starting point, but everyone else around was a stranger and a possible enemy. Their goal was to reach the next level in order to find their family and friends and do everything possible to survive, but the path will be a lot bloodier than expected... to make things even more complicated, Andrew's system didn't agree with him.