On October 31, SM released a mysterious new teaser on their official YouTube channel.

The teaser contains only a date (November 21) and the words “She Is Coming.” In the video, a woman with a clown mask stands in various spots around the city.

In the voiceover, which has been manipulated to hide the woman’s real voice, she says, “I gained a lot of weight, right? I hated it when people recognized me [because of that] and I wished that no one would know who I was. I think there will be a lot of people who are shocked, because I was shocked myself.”

She continues, “I will put everything I have into this project to show my gratitude and prove my loyalty.”

Watch the teaser below!