• Lee Jong Suk attends the Burberry show during The London Collections Men AW16 at Kensington Gardens on January 11, 2016 in London, England.

Lee Jong Suk attends the Burberry show during The London Collections Men AW16 at Kensington Gardens on January 11, 2016 in London, England. (Photo : Getty Images/Eamonn M. McCormack)

"W-Two Worlds" episode 12 airs Aug. 31, Wednesday on MBC. The show will move forward with Kang Cheol (Lee Jong-suk) and Oh Yeon-joo's (Han Hyo-joo) love story in the webtoon world. Here are the detailed spoilers for the next chapter of the series. Read on to find out what happens next.

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[Spoiler alert! This article contains spoilers for "W-Two Worlds" episode 12. Do not read further if you don't wish to know more about it.]

In the previous episode, Yeon-joo returns to the real world to gather material to save the love of her life after being shot by a bullet. This is the first time she sees her father who is now a no face killer. She is shocked to see her father, who is now being controlled by the killer. Time passes by before Yeon-joo realises.

Meanwhile, in the real world, Kang Cheol finds out that he is Yeon-joo's husband, who has disappeared. Kang Cheol asks Yeon-joo to alter the storyline written by her father.

Moving on to "W-Two Worlds" episode 12. While there are not many details about the twelfth episode available, the network has released a promo video teasing what happens next for Kang Cheol and Yeon-joo. The trailer opens with Yeon-joo asking Kang Cheol if he remembers her.

The two walk in the real world hand in hand as Kang Cheol suggests that they start dating like other couples.

"You have to give me a chance to catch up," Kang Cheol tells Yeon joo in the promo for "W-Two Worlds" episode 12.

They seem happy until the killer contacts Kang Cheol and issues a warning, again.

"You no longer have the right to be a protagonist," the killer says in the promo. "You are a murderer and a fugitive. You will probably disappear soon."

Things get violent between the hero and the villain. In one shot, Kang Cheol is seen pointing a gun at Yeon-joo's father. Meanwhile, Kang Cheol makes Yeon-joo promise him that she will help him change the story. He asks her to draw one more picture and make it look like a dream.

For their new plan, Kang Cheol suggests using known variables to their own advantage. And Kang Cheol declares that from now on, he will summon himself. Scroll down to watch the promo for "W-Two Worlds" episode 12.

"W-Two Worlds" episode 12 airs Wednesday at 10:00 pm KST on MBC. Stay tuned for more spoilers and updates.