The Secret of the Coral Cave

The Rugendo Rhinos Club boys are on vacation with their families in Mombasa. They make friends with Salim, whose father is a fisherman. After a few days, Salim's sister disappears. Jona follows some mysterious footprints and concludes the girl must have been kidnapped. The boys believe she will be trafficked to the Middle East and sold as a slave. Will anyone believe them? The boys stumble onto a coral cave near the beach where the traffickers hide their victims - along with some ivory. The Rhinos try to devise a trap to catch the traffickers.