1918. Boston. A city in turmoil as soldiers return home from World War One, bringing with them an epidemic of Spanish influenza. Danny Coughlin is the son of one of Boston's most powerful police captains. An undercover cop, he is hunting for revolutionaries and anarchists who, in the aftermath of war, are pledged to overthrow the city's ruling classes. But Danny soon finds his ideals compromised as, drawn into the conflict, his family starts to q...