Forensic psychologist Alex Cross travels to North Carolina and teams with escaped kidnap victim Kate McTiernan to hunt down "Casanova," a serial killer who abducts strong-willed women and forces them to submit to his demands. The trail leads to Los Angeles, where the duo discovers that the psychopath may not be working alone.

A man obsessed with conspiracy theories becomes a target after one of his theories turns out to be true. Unfortunately, in order to save himself, he has to figure out which theory it is.

When her mother is killed in a mysterious house fire, rebellious teen Debbie Strand is sent to live with her grandmother, where she becomes even more unhinged. She develops an intense crush on her hunky creative writing teacher, Peter Rinaldi, but her numerous attempts at seduction end in failure. Soon Peter's friends start turning up dead, and he fears that his fiancée, Marilyn, may be Debbie's next victim.

A federal witness runs away and a team of government agents track him down, but when they take a shortcut on the return trip, they're attacked by zombies.

After exposing police corruption, a journalist is drawn into an underground world of violent vigilantism.

Alex Cross, a Washington D.C. cop and forensic psychologist learns that his niece who is going to college in North Carolina is missing. So he goes there and learns that the police think she's among the victims of someone who kidnaps young girls and holds them captive and kills them who dubs himself Cassanova after the great lover. Later Kate, one of his victims, escapes and tries to help Cross find his niece.