Well the long and the short of is this :
-Hero from Divine Divinity chooses to let the baby live instead of killing him and he raises his as his own child because he thinks if he teaches him the ways of good, that he won't turn evil
-As he grows up he shows alot of potential for magic stuff but his father doesn't allow him to learn too much because he is afraid he might abuse that power one day.
-One day, the boy falls in love with a girl which happens to be a member of the black ring, she wants to teach him dark magic so he can become what he truly is; the damned one.
-As you probably know, it's the hero's task to kill members of the black ring so after they capture the girl they decide to kill her but the boy (Damian) walks in on the execution and watches his father kill his loved one.
-Damian swears revenge and musters a large force of evil of all kinds and attacks the army of the hero (Lucius If if I remember correctly).
-During the battle Lucius manages to lead Damian away from the battle into a crypt of some sort where he had seen strange rifts to other dimension before. Instead of killing Damian he pushes him into a rift and he puts a protective spell on the rift (or on damian, can't rememb)erso he can't just get back by stepping back into a rift in the other side.
-So damian gets sent to the world of Nemesis where he is found by the ranaar. He can't remember who he his though. The ranaar take him to the riftrunning academy where the leader of the academy opens a rift for him to take back to his own world but he can't step through it because of the spell. So the ranaar decide to teach him the ways of riftrunning so one day he can go back himself by making a portal.
-However, this fails as well and he becomes really really pissed off. So the High Elder of the academy goes to rivellon to find out some info about the boy so after a while he meets Lucian who tells him of Damian and of the curse. He tells Damian that the curse can't be broken, only by Lucian himself. Damian doensn't believe this and kills the Elder.
-Damian orders some imps to steal a special crystal from the Ranaar which keeps the Demons vulnarable, the crystal stops the demon regeneration or smething like that. With it, the Ranaar can kill the demons. So together with a demon army he attacks the high academy to use it's secrets to get back home. The Ranaar try to defend the Academy but all seems hopeless. That's when the demon Asmodeus appears in front of Anlokam, who is the daughter of the high elder. He offers her to stop the demons and save her people in exchange that she becomes his slave. She agrees but he has tricked her because everyone was already dead when she agreed.
And that's where beyond divinity begins!
