Jason Gedrick and a small group of Marines are stranded in the remote Afghan desert. But it ain't the Taliban that's worrying them, it's these giant refugees from Tremors. In fact the big worms prove to be an ally of sorts by doing better against the Taliban than themselves but battling these enemies is something not covered in their training.

Barry Kohler, a young Nazi hunter, tracks down a group of former SS officers meeting in Paraguay in the late 1970s. The Nazis, led by Dr Mengele, are planning something. Old Nazi hunter, Ezra Lieberman, is at first uninterested in Kohler's findings. But when he is told something of their plan, he is eager to find out more. Lieberman visits several homes in Europe and the U.S. in order to uncover the Nazi plot. It is at one of these houses he notices something strange, which turns out to be a horrible discovery.

The Economist reporter Jack Elgin, a workaholic, takes his family on a working trip to India, where he is to interview the PM. But their US airplane is hijacked in Limassol (Cyprus) by the unknown August 15 terrorist movement, which ends up in a bloodbath. Jack can save his pre-teen son Andrew, literally in his arms, but his wife and daughter are among the slaughter victims. Western governments seem unwilling to go after the fiends, even hide the identity of a high-profile fatal victim. Although now a single father, Jack uses all his contacts and snooping skill to seek the truth himself. A London-based Serbian free newspaper editor sets him on the trail of four Balkanic killers, but is murdered. Jack decides to exact revenge himself, tipped-off by Sûreté-contact Dugay. Meanwhile US embassy official Davidson and FBI Special Agent Jules Bernard play a key part in the official, MI5-lead investigation, which ends up crossing Jack's path.

Ryan has been plagued with nightmares since the night his sister Amy went missing 8 years earlier after playing the game "Bloody Mary." Amy had stumbled onto a website on the Internet (www.marked4mary.com) about a witch called Bloody Mary and a game to summon her evil spirit. Now a senior in college, Ryan is reaching a mental breaking point from the years of stress and guilt from his sisters disappearance. His girlfriend Rachel frustrated herself at Ryan's emotional distance and self pity, calls for help to a former professor of Ryan's, Father O'Neal. Father O'Neal is both a priest and a archaeologist who decides to help Ryan end his tormenting grief by using his detective skills and wit to figure out what exactly happened to Ryan's sister, and uncover the truth to the Legend of Bloody Mary.

A series of strange accidents plaguing a city located near the mine. Two people were pulled through the funnel, which formed after the collapse of tunnels under the lake. Geologist Nina Thiemann discovers that the mine tunnels are insecure and unstable. A woman with an expert in the field of explosions and a father, a former miner, descend into the ground, hoping that they will prevent catastrophe.