Harry returns to Paris. While he is standing on the bridge watching the river, he meets Helen, who reminds him of Cynthia. After the death of his beloved mentor Uncle Bill, Harry receives as a bequest a letter from his uncle that gives him the riddle of the leopard. Harry's bartender suggests that the leopard ended up there as he was on a false scent and became lost, but Harry takes Helen on a safari to Kenya to learn the answer of the riddle. He is injured and develops an infection. As Harry nears death, the protective Helen fights off a witch doctor. Following the directions in an emergency first aid manual, she opens Harry's wound to release the infection. At the dawn a medical party arrives by airplane. The vultures and hyena who have been awaiting Harry's death leave and never return. Harry realizes his love for Helen.