 In Italy, Jimmy Olsen and Clark Kent learn of the disappearance of two expert divers beyond an offshore reef. Jimmy foolishly swims to the reef and is captured by two vicious aquatic creatures known as mermen. The mermen take Jimmy to their land, a vast ocean pocket beneath the Earth s crust containing the sunken city of Emor, a Roman seaport buried by an earthquake centuries earlier. Jimmy is put into a cube with the missing divers and placed in the coliseum to be battered about and then destroyed for sport by gigantic lion sharks. However, an emergency signal from Jimmy brings The Man Of Steel.