Frank Hargate is an unassuming but intrepid young student of natural history whose cool head saves several schoolmates from drowning. The grateful father of one secures Frank's appointment as assistant to Mr. Goodenough, a famous naturalist who is planning a two-year expedition into the heart of Africa. Frank and Mr. Goodenough have many wonderful and perilous adventures, culminating in their capture by the fierce Ashantis.."