Lieutenant Giovanni Drogo is assigned to the old Bastiani border fortress where he expects an imminent attack by nomadic fearsome Tartars.

An engineer named Francesco arrives on Emerald Island in the Seychelles and is instantly smitten with the local girl Jeanine, whose sister ran off with the previous engineer -- neither of them to be seen again.

John and Howard work in a company named Safari Express booking tourists on safaris. Their lives are turned upside down when they encounter a beautiful blonde wandering in the jungle who doesn't know who she is. They also discover uranium and what appear to be some well-mannered simians.