Poltergeist: The Legacy (1996)

Season 1: Episode 14

While checking down in the sewers a couple of city maintenance men find an ancient urn holding ashes. One of them tips the ashes out and continues on with his work. After the two men separate to work in different areasone of them is attacked by a ghostly Chinese woman. The next morning the Legacy gets a call from a Chinese friend who asks them to help investigate the circumstances behind the two missing maintenance workers.