Jaded detective John Verney is on the trail of an ancient cult of Plague Doctors which is cutting a bloody swathe through the London underworld. Dismissed by his superiors as gang on gang killings, the murders draw Verney into an obsessive maze of a secret society conspiracy with links to the Jack The Ripper murders of 1888, putting him and his family in grave danger.

https://www.themoviedb.org/movie/1320756-doctor-plague