The Pteranodon family rides a special 'Night Train" to another part of the Cretaceous Time Period, where they meet a Troodontid "cousin" of the Conductor's, Sidney Sinovenator, who knows more about the stars than anyone. Sidney takes the family up to his favorite stargazing spot, "Starry Hill," and teaches the kids why the stars seem to move across the night sky. When the kids build their own version of a nest on the beach, below their actual family nest up on the cliff, they get the idea to turn their beach nest into a clubhouse. Shiny thinks that a clubhouse needs a club, and "the Nature Trackers" club is born! The kids decide to make their club about getting outside, getting into nature, and making new discoveries. The only problem is: which kid is in charge of the club?