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As Harry delves deeper, another incident occurs at a nearby amusement park where the same criminal ignites a fire, seemingly linked to the roller coaster accident. Pressured for answers, Harry becomes increasingly suspicious about the circumstances surrounding the tragic events. His pursuit of justice leads him to uncover that the owners of both parks are on a suspicious trip to Chicago.

In this city, Harry attends a meeting where the park owners receive a tape from the criminal admitting responsibility for the chaos. The message demands a ransom of $1 million, threatening future attacks unless paid. This chilling interaction reveals the depths of the criminal's sinister plot, as he cleverly monitors the meeting using hidden devices.