ALWAYS MY GREEN

Long time ago, there was no such thing as countries but kingdoms and there were only three of them.
Now, it has reached a time where old rulers need to step down and new rulers to raise in the three kingdoms. What happens when the unexpected happens and people have to rethink about their way of life and traditions. What happens when Peva one of the kingdoms princess meets a young man from the other kingdom and ends up being her green despite all the kingdoms not being in good terms? What happens when there is a traitor that wants Peva dead?