Can someone explain me the story i don't get it at all ┗( T﹏T )┛

So the crowd prince in the future is in a coma and he is like some kind of dream about his past life

This is how i understand it:
They were lovers in the past, i guess Yeon was part of a secret ninja or something but i feel kike their group isn't to harm the royals because Yeon killed that man who had ill intentions with them them the prince mistook Yeon for the evil spy one so hi killed him then he realized it was Yeon. Yoen died, their baby died, the prince regrets it then he was punished by the" God" but he asked if they could meet once again and now the rest is the future.
But i might be wrong ╮(. ❛ ᴗ ❛.)╭

I'm talking about the whole manga story