In London in the early 1900s reporter Sonya Winter (Diana Rigg) is researching the possibility of assassins using newspaper articles that serve as signals to high-profile murders that have been occurring. Winter shocked to find that businessman Ivan Dragomiloff (Oliver Reed) runs an assassination bureau, an organization that, for a price, will kill anyone in the world, but mostly certain high-profile transgressors. Sonya is a staunch supporter of womans rights and as a way of making a political statement that she can report in her newspaper, she offers to pay Ivan an enormous amount of money if he will have his bureau kill him. Ivan readily agrees thinking that the stunt will be good public relations and a boost to his business. But Lord Bostwick (Telly Savalas) wants control of the business Ivan has established and attempts to make sure that the contract is fulfilled and Ivan taken out of the way. As Winter follows Dragomiloff to report on his eventual demise, they fall in love and she finds herself reversing her feelings about his bureau, but it may be too late to avoid the onslaught of assassins.