When Sawa's mother and policeman father are found victims of a grisly double homicide, she begins a ruthless pursuit for the man who murdered them. With the help of her father's ex-partner, Karl Aker, and a mysterious friend from her past, she becomes a merciless teen assassin, blasting her way through the dark world of human trafficking only to uncover a devastating truth

In the near future, all teachers give lectures in front of an empty classroom and a simple webcam, broadcasting their lesson over the internet. An history teacher is about to see his daily routine shaken up...