Operating out the Lyric Theater in downtown, theatrical criminals Silver and Sprocket Nitrate have created a fake copy of a long-lost black and white Captain Video television show that was Vitamin Flintheart’s first film role. Vitamin, who was doing a King Lear show with On Stage star Mary Perkins visit the Nitrates to watch a small portion of the video. Silver then asks for $300,000 to finish his restoration. Mary suggests Vitamin think long and hard about this transaction but Vitamin seems to have already made up his mind and goes about withdrawing the money.
Meanwhile at the Lyric, a shady actor named Miles Mycroft meets with Silver and Sprocket. Miles played Vitamin’s role in the film and wants to get paid but Silver instead chooses to strangle Miles and feed him to the Nitrate’s pet hyena Lena. This would be the start of their undoing as Mary Perkins had recognized Miles as Vitamin and asks Dick Tracy to help Vitamin with the scam. When confronted, Vitamin reveals he knew all along it was a con as he actually played the role of a monster and not a video ranger.
Dick and Sam approach the Nitrates at the Lyric to ask them about a fellow named Miles Mycroft and the authenticity of their films. Silver doesn’t admit to knowing Miles and claims all his videos are legit. Tracy leaves, knowing otherwise but still gathering information and he and Sam search the theater garbage where they find a Silver’s bloody jacket from when he murdered Mycroft. The Nitrates meanwhile, decide to blow town without the money and head to the train station to take the Silver Zephyr. The train escape is a misdirection though and the Nitrates double-back and pick up their car at the Cars of the World Museum.
Their car is in fact the famous Flattop Jr. car, completely restored since it’s destruction many years ago and modified to include air horn machine guns. The Nitrates nearly escaped cleanly, but Lizz was on their trail to the train station and while waiting for a train she also stopped at the Cars of the World Museum and asked about the missing vehicle and puts two and two together when one of the owners matched the description of the perpetually barefooted Sprocket Nitrate.
The chase is soon on with Sprocket driving (Silver doesn’t know how) and Sam and Dick soon tail the Nitrates. The brother-sister duo deploy caltrops which flip Sam and Dick off the road. They then ram through a police roadblock, firing the machine guns in their air horns the whole time. Sam and Dick quickly acquire another vehicle and begin a local grid search while the Nitrates hide out in a barn.
Lena escapes briefly and Silver goes to fetch her, giving him advance warning of Catchem and Tracy’s police vehicle. The Nitrates quickly jump back into their car and burst from the barn, racing towards a lake. Sprocket is upset at this point, blaming her brother for this whole mess which they didn’t even make money on. Silver smacks her hard and she fumes and drives straight into an ice-covered lake. The car crashes through the ice and sinks to the bottom, with Silver in a panic. Sprocket calmly explains the car is air tight and can survive this and informs Silver that he’ll never hit her again. The police send divers into the lake but the Nitrates are gone.