The Night King's backstory will be the huge plot point of "Game of Thrones" Season 8. And his true identity might just as well be the final twist of the series. After all, the showrunners already confirmed the three twists that came straight out of George R. R. Martin's pen.

First, we had Shireen's death, then an equally devastating Hodor reveal. So given the fact that "Game of Thrones" is filled with heartbreaking moments like these, it's extremely hard to pinpoint what the final twist will be. And in our opinion, it's going to involve The Night King.

Let's find out how this might play out.

The Night King's name sounds familiar

Now, the real question is how George R. R. Martin's final twist could involve the Night King, a character who doesn't even appear in the "A Song of Ice and Fire" books. The answer is, however, simple. Just because we haven't heard about the White Walker leader in the books, that doesn't mean that we won't. There is also a certain figure from the Age of Heroes whose name is strikingly similar to that of the Night King. We are, of course, talking about the 13th Lord Commander of the Night's Watch who became the Night's King after he fell in love with a female White Walker.

It is our belief that the White Walker leader we see in "Game of Thrones" is loosely based on this legendary figure.

But before we delve into all that, let's go through everything that happened during the Long Night. Because only then will we be able to explain who the show's Night King really is.

The subtle detail in 'Game of Thrones' Season 7

"Game of Thrones" Season 7 featured an immensely important scene in which Jon Snow showed Daenerys Targaryen the ancient carvings in the Dragonglass Cave on the island of Dragonstone.

It was here that we learned that the First Men and the Children of the Forest fought together against their common enemy, the White Walkers.

There was, however, something strange in a way the White Walkers were depicted. We saw three figures with blue eyes with one of them wearing the Night King's crown. But here's the thing: This White Walker has a goatee, and he looks nothing like the Night King we see in the show.

Check out the scene down below.

This subtle detail casts a new shadow on the Westerosi legend of the Long Night and the Night King's identity. So here is what we think happened during the first Long Night.

The Azor Ahai connection

According to the Long Night legend, Azor Ahai called out his wife Nissa Nissa and then he drove a sword into her chest to forge the Lightbringer. It is our belief that this was where Nissa Nissa was actually turned into the White Walker. That allowed Azor Ahai to finally forge the magical sword that he later used to kill the first Night King (the one with a goatee.) Then Nissa Nissa and the rest of the White Walkers were banished into the Lands of Always Winter, and the Wall was raised to prevent any future invasions.

This theory states that after several years Azor Ahai joined the Night's Watch to be in the first line of battle should the enemy dare to attack again. And it wasn't long until he was elected the 13th Lord Commander. Azor Ahai fought bravely whatever was left of the White Walker army until one day he spotted a woman with "a pale white skin cold as ice and eyes like blue stars" on the other side of the Wall.

Nissa Nissa is the Night's Queen

According to our theory, this strange woman was none other than Nissa Nissa in her White Walker form. And given the fact that Azor Ahai was still madly in love with his wife, he couldn't resist her even though she was no longer herself. They made love and this was where he realized that he wants to be with her again, no matter the cost.

That's why he was turned into the new Night King. He would then rule the Wall alongside his Queen for thirteen years from the Nightfort, the biggest Night's Watch castle. And together, they were making constant sacrifices to the White Walkers. Then the King in the North and King beyond the Wall joined their forces, banished the Night King to the Lands of Always Winter and captured his Queen. She has been kept inside the Crypts of Winterfell ever since, protected by the dead Kings of Winter.

So now, thousands of years later, the Night King is out for revenge with his great army, and he is heading towards Winterfell to defeat the Starks and free his beloved Queen from the Crypts so they could be together once again.

It is our belief that the Night King's backstory will be explored in a flashback right before Jon Snow, Azor Ahai reborn, kills him with the new Lightbringer. Jon will forge this new magical sword by stabbing Daenerys in the chest thus turning her into the White Walker. That's how the story will come full circle in a true George R. R. Martin fashion. And only then will we be able to realize that the villain is just the hero of the other side.