It's been day 2, still Sandra couldn't find Lisa anywhere. If not that she was looking for Lisa to tell her about the Principal's suggestion of borrowing her dorm for the coming student, she wouldn't have known that Lisa had gone missing!
At first, she thought Lisa must have gone out of campus, but after calling, and messaging her on Chatme without response, she realized that something must have gone wrong, so she started to investigate secretly.
Meanwhile, a video of Lisa getting humiliated, tortured, and beaten had gone viral in the student groups. The staff wasn't aware because the groups were 'no staff' groups, except for the official school's group which no one posted the video to.