The movie opens with the introduction of the Sullivan family. Frank (Dennis Quaid) is a heroic New York firefighter, and escapes a harrowing situation to return home to his wife and his 6-year-old son John. It's an exciting time in New York, as the 'Miracle Mets' have made the World Series. Frank is a ham radio user, and a strange disturbance in the sky (solar flares, I believe. I never took astronomy) in the sky has really increased the range of his radio. "I'm reaching people I've never reached before", he says. Flash forward to 1999, when young John has grown up into a 36-year-old NY homicide detective (James Caviezel) with relational problems (and possibly a drinking problem as well). We learn his father died several years earlier in a warehouse fire, and it's obvious that John has never really gotten over it. He ends up setting up the old ham radio (did I mention that the solar flares are back?), and contacts a fellow New Yorker named Frank. It certainly won't ruin any big surprise when I tell you that it's his father Frank--in 1969. After recovering from his astonishment and convincing his father who he really is (his knowledge of the 1969 World Series proves quite helpful), they begin a series of nightly conversations. Unfortunately, their conversations change the past--and the future--in very dangerous ways. A serial killer who should only have 3 victims suddenly has more, and John must use his knowledge of the crimes (30 years old to him) to guide his dad in a 1969 pursuit of the killer. And the chase is on. Will they stop the killer? Will the solar flares last long enough for them to finish their plan? Will anyone in 1999 or 1969 believe them? That lengthy 'plot summary' really didn't ruin any of the suspense--or come close to explaining the whole story. So, it goes without saying that the story is pretty convoluted and involved. But it's not hard to follow, and the movie grabbed me and kept me interested throughout. Granted, you will need to use a serious amount of 'suspension of disbelief'. If you get hung up on "there's no way they could be talking to each other" or "changes in the past wouldn't immediately appear in the future--they would have already happened and would have been there all along", you'll do 2 things: (1) you'll give yourself a headache, and (2) you'll miss out on a very entertaining film. The reason I gave this more stars than last week's "U-571"? I cared about the characters, and I found "Frequency" much more entertaining. Also, the story was quite original--with great use of the Miracle Mets and the 1969 World Series throughout.