- You need to tie Sophia up so she doesn't leave the Beach Tower.
- Search the Table at the bottom of the Beach Tower and you'll find a Rope and tape.
- Tie up Sophia.
- Leave the Beach Tower for now.
- After infiltrating Area 69, if you return to the Beach Tower, you'll find blood all over the room and—even worse—Sophia is missing.
- During the quest Deeper into Area 69, you'll run into Sophia standing outside Building F of Area 69, covered in blood. She faints, and you bring her back to your Basement.