Watch Monsters, Marriage and Murder in Manchvegas for Free: How to Stream the Movie Online at 123Movies. . When a homicidal madman begins slaying young women in the idyllic New England town of Manchvegas, it's up to a trio of cunning local freelance businesspeople known as M.O.S. -- the Manchvegas Outlaw Society -- to get to the bottom of the crime spree. Meanwhile, a band of hairy forest monsters also menaces the village.