Shocking Dark (1990)

Venice, the ancient city of Mian, is unfortunately eroded by floods one day in the future. The government organized a commando team to prepare for the rescue work. Oddly enough, the rescue work turned into an underground war. A group of monsters were found in the underground passage. What is more severe punishment is that the commandos were maimed one by one. As a result, scientists have found that a strange phenomenon is vaguely affecting the city. In this way, the people of the whole city are facing a crisis and waging a fierce struggle with this strange and terrible thing.