Witch and the Watcher

In a faraway place, two lost souls are being hunted. A witch wants their heads, sending a gang of marauders after them.
Others want them too. An ancient evil, hell-bent on revenge, wants to claim them for his own.
Meanwhile, a mother and son are coming to terms with the death of their loved ones. Soon after, the boy starts to dream of distant souls who need help.
Can he help them find the way home before they are lost to the darkness... and manage to evade the evil that plagues his family?