The Flattery siblings put their heads together to figure out who's poaching rhinos in a Kenyan wildlife park

Foghorn Flattery may be a twelve-year-old genius, but to his sister C.C., he's just her know-it-all big brother. Foghorn can be annoying, but when they're faced with a mystery, he is definitely someone C.C. wants on her side. Their father takes them to Kenya, where he's doing research for an article about rhinoceros preservation, and the family discovers that a group of poachers is killing rhinos at a wildlife park. What's worse, it appears that one of the park's workers may be helping the criminals!

The Flattery siblings are determined to save the park's two new baby rhinos and catch the bad guys. With Foghorn's big brain and C.C.'s big heart, these two make a great team. However, protecting the rhinos may put Foghorn and C.C. in more danger than they ever imagined.