While not in class, Brady (Garrett Clayton) and his friends spend their spare time making prank calls that they upload online to receive millions of views. As their online celebrity begins to rise, the boys escalate their pranks to a dangerous level. One evening, Brady and his best friend (Gregg Sulkin) receive a prank call of their own, igniting a nightmare for the pair of teenagers when a mysterious stranger turns their own game against them with deadly consequences.