The Truth behind the Lies

Read the story to find the truth behind the story
They know more then they speak?
The Unknown Creatures live on one side within the Mountains which no human can cross the bridge and the humans
live on the other side no one allowed to cross or they will be punished
but this wasn't always the case?

By coincidence they meet but can they find out why it is like this and can they reunite the peace or make things worse and start the beginning of the war