John Sullivan (Jim Caviezel) has always dreamed of stopping the tragic death of his father, a heroic firefighter. When he discovers his father's old ham radio, he finds himself talking to a man who appears to be his own living father, in the very same house, but exactly three decades ago. John alerts his father (Dennis Quaid) to the mistake that cost him his life the first time around and saves his youthful father from his fate.
But in changing the past, he has changed the present, resulting in a string of homicides, including the grisley murder of his mother. Now, John and his father must race against the clock - divided by three decades and connected only by a radio - to prevent a murder that will seal their destinies. And each time Frank changes something in his universe, John wakes up to a whole new reality.
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