The hacker Josh invades the computer of Douglas Ziegler, who is developing a powerful wireless signal, and accidentally releases a mysterious force that takes the will to live of human beings, generating a suicide epidemic and increasing the force. His girlfriend and student of psychology, Mattie, sees each one of their common friends die and the destruction of the modern world, and together with her new acquaintance Dexter, they try to plan a virus developed by Josh in the network to shutdown the system and save mankind.

A young Japanese woman who holds the key to stopping the evil spirit of Kayako, travels to the haunted Chicago apartment from the sequel, to stop the curse of Kayako once and for all and save a family who are currently being haunted by her malicious spirit.

After the death of her ill mother in a fire, the young teenager Anna tries to commit suicide and is sent to a mental institution for treatment. Ten months later, Anna still cannot remember what had happened on the night her mother died. Her psychiatric Dr. Silberling, however, discharges her telling that she has resolved her issues. Her father and successful writer, Steven, brings her back home in an isolated mansion nearby the coast. Anna finds that her mother's former nurse, Rachel Summers, is her stepmother now. Anna meets her beloved sister, Alex, swimming in the sea. She discovers that Steven has not delivered the letters and CDs that Alex had sent to her. As time moves on, Anna is haunted by ghosts and she believes that Rachel killed her mother. Alex and Anna decide to look for evidences to prove that Rachel is the murderer and Anna discovers the truth about the fire in the boat house.

Molly Hartley looks to put her troubled past behind her with a fresh start at a new school, where she sparks with one of the most popular students. But can her secrets stay buried, especially as she learns more about the horrific truth that awaits her once she turns 18?

Jigsaw and his young apprentice, Amanda, are dead. But the grisly games continue. 5 supposed strangers find themselves in the midst of the big game, and believe they are in a survival of the fittest competition. Via his now infamous video linked doll, Jigsaw conveys the message that they should ignore there instincts, and ignore his advice at their peril. Meanwhile, agent Strahm wants to prove that Hoffman is an apprentice to Jigsaw, and pursues him as he continues his twisted games. What Strahm does not realize is that Hoffman is testing him all along, and must pass his test in order to stay alive.