One of Us Is Lying opens up with high school students in detention for having phones that weren't theirs all ring in class at the same time. The students began discussing why they were all put into detention and who planted the phones.
CLIMAX
A very unpleasant student starts to turn red and pass out. They realized that he had an allergic reaction. They called an ambulance and the students left traumatized. The police began to suspect the teens but one in particular.