The story involves a series of murders in Charron’s performing company, murders caused by various members getting doused with vitriolic acid. Turns out all the people killed have a common denominator in their past, one which has recently re-surfaced, and is out for their blood. Will the past be uncovered before it kills again? What awful secret has came back to haunt the living?

A serial killer, who drains his victims for blood is on the loose in London, the Police follow him to a house owned by an eccentric scientist.