The movie opens with a pretty woman in a large house running from an unseen assailant. The investigation of what happened includes the FBI because clues point to a serial killer. Agent Kurt Novack receives a call from a mystery man on his cell phone. Then he goes home to his wife and son.
The killer strikes again. Then a strange thing happens: he apparently shows up in Australia. Novack has to fly to Sydney, and he brings his family. Big mistake! While Novack helps question a suspect, his family has fun near the Opera House. Novack doesn't believe the right man has been arrested, but the Australians are confident.
When the time comes to fly home, Novack's family has been put on a different plane, but at least they're in first class, at no extra charge. One passenger is late, so the plane doesn't take off right away. Novack's wife gets a mysterious gift which indicates the killer may be involved. Then Novack gets another phone call from the mystery man! And there is more: his wife and son know something he doesn't.
The second half of the movie has a lot of tension and suspense, and the excitement level gradually increases until we finally reach a frightening climax. Novack questions several people and manages to go overboard with most of them (not particularly realistic, but entertaining). On the ground in the United States, the FBI searches for clues.
I enjoyed this movie. Personally, I would have hoped for a little more of the excitement, but the mystery was still interesting. Otherworldly music added to the scary parts. One woman who was held prisoner really came across as terrified, but I didn't catch her name. And the mystery voice was quite well done--whoever it was!