Train dispatcher Vince Coleman sacrifices his own life to save a train from the Halifax Explosion.

Canadian businesswoman Dinah Middleton's is devastated when her teenage son, Alex, is killed by a hit-and-run driver. When the police fail to turn up any suspects, she turns private detective to track the killer down. She traces the murderer to New York, only to discover that the crime is not covered by the extradition treaty between Canada and the US. She becomes obsessed with bringing the criminal to justice.