A class of students stays at school for a camp in an elite study group to finesse theirs and the school's grades. Upon the first night, the swimming coach is found murdered. As the students try to figure out what happens, a voice informs them that if they don't figure the murder out, students will begin dying in quick succession.
A brilliant math teacher formulates the perfect cover-up after his neighbor murders her abusive ex-husband.
On his way to work, a bank manager receives an anonymous call claiming there's a bomb under his car seat, and if anyone exits the car, it will explode unless he can pay a ransom.
