When the Pteranodon Family visits Troodon Town for a big Father's Day celebration, the Conductor sees Mr. Pteranodon enjoying being celebrated, and is compelled to ask his mother whatever happened to his father. She decides that he's ready to learn the truth and tells him the story about how his father was the bravest Conductor of them all and dared to build an experimental Drill Train and tunnel into the future -- she believes to the Cenozoic Era, which no dinosaur had ever seen. Unfortunately, the Conductor's father never returned, and is apparently lost. The Conductor decides to take the new Drill Train and tunnel into the future to rescue his missing father!