Luke has been strapped to an atomic bomb by Gideon Mace, who hopes to use it to blow up Chicago in his bid to take over America. Luke however, manages to free himself, and goes to the local police, who have just been told Mace's demands.
Luke works with the police to find Mace, and with the help of Burgundy, Luke manages to smash Mace's operation. However, during the final fight with Mace, Gideon seemingly dies when he falls down an elevator shaft. Mace having trusted nobody, the knowledge on how to disarm the bomb apparently died with him.

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