An old student of Karl Bergen, Rick Madison, spends the honeymoon with his wife Erika in the reserve. They are looking for a special place for their camp to enjoy nature observation . Suddenly their servant Ali fall ill with a high fever. On the trip to the warden station where he wants to get help, Rick drinks from a canteen and shortly afterwards he shows the same symptoms as Ali's. Now Erika must be warned not to drink the contaminated water.