Last Days vs. New World

*In the distant past, God had sent the punishment to this world.
So the flood came…
It covered almost all lands, In order to survive human had to live on the boats.
Those land which did not overwhelmed are ruled by the different monsters.
The day of human kind has already pasted.
No human can get into those lands deeply.
Until one day, Two young boys has came to this land from their boat.
In there they had met a mystery men who’s willing to guide them.
As the mankind who came from the old world, for the first time they start to travel into this new world and trying to find way to save the humankind.
Who is this man? Could the brothers success?