The summary is:
The members of SEVENTEEN play a summer horror challenge in an escape room with killers and a mysterious woman. They divide into teams of 2, 1, 2 and try to find the key to get out. Jun loses the game and has to film a vlog alone in the room. The others are curious about the woman and check the camera footage. They suspect that the production crew is hiding something.
Here are the key facts extracted from the text:
1. The text appears to be a transcript of a video featuring the K-pop group SEVENTEEN.
2. The group is participating in a summer horror challenge, which involves an escape room.
3. The members are discussing the rules and format of the challenge.
4. They decide to play a game to determine who will go into the escape room first.
5. The game is called "Hongsam game" or "1+1".
6. The members take turns playing the game, and the loser will go into the escape room.
7. Dino is chosen to go into the escape room first.
8. The other members are discussing the challenge and their experiences.
9. They mention seeing a woman in the escape room, but it's unclear if she's real or part of the challenge.
10. The members are suspicious of the staff and wonder if they're hiding something.
11. They decide to review the footage to see if they can find any clues.
12. The video ends with the members still discussing and speculating about the challenge.
Note: There are some parts of the text that are not clear or are open to interpretation, so I've tried to stick to the most objective and factual information.