As Jimmy and Annie continue to tell their awe-struck classmates, things are really beginning to heat up in Costa Rica. The search for the Chupacabra has taken Jimmy and the Professor from the jungle canopy to the beach at Tamarind and eventually into the dangerous estuaries on kayak. Meanwhile, Kaitlin and Annie, who always seem to be one step behind the two adventurers, manage to track them down with the help of a couple of lucky breaks involving Annie's cousin, Juan, and Federico, the Professor's trusty pygmy African tree frog sidekick. However, though Kaitlin and Annie arrive to find Jimmy safe and sound, the Professor has seemingly disappeared. Closer inspection reveals that he has abandoned his kayak and continued on foot into the jungle in a final, desperate attempt to catch a glimpse of the ever-elusive Chupacabra. It is a climactic final pursuit that, as the Professor himself admits to the absolutely riveted classroom, still does not fully uncover the mystery and intrigue of the Chupacabra, a creature undoubtedly best left to the jungle