The dry ice used in the rainfall is problematic. The people arranged by Nathan Foster are already losing their minds.
Only South Grant inside the villa remains unharmed.
All the surveillance here was destroyed by people sent by Vivian Lockwood. By the time Nathan Foster returns from negotiating with The Lucky King, he'll only receive news of South Grant's mysterious disappearance.
Moreover, Vivian Lockwood received reliable information that South Grant's secondary personality is extremely difficult to control. Three years ago, after she suffered a brain injury and underwent surgery, they said she should only rest quietly.
Once her secondary personality emerges again, the original South Grant might be doomed.
Vivian Lockwood then instructed the people outside, "Clean up all traces here, let's withdraw."
If South Grant is killed and Nathan Foster investigates, Vivian Lockwood wouldn't be able to withstand Nathan Foster's revenge.
