What happens in the first 50 pages in Scat?

In the first 50 pages of "Scat" by Carl Hiaasen, the main characters Nick and Marta investigate their eccentric science teacher's disappearance during a field trip in a Florida swamp. They encounter a series of mysterious events, including the discovery of rare skunk cabbage plants, encounters with suspicious individuals, and uncovering a possible connection to a missing soldier. The story sets the stage for a thrilling and suspenseful mystery.