(pronounceddouble-u delta zed) is a 2007 crime horror thriller film starring Stellan Skarsgård , Melissa George , Selma Blair and Tom Hardy . The film was released in the United States with the titleThe Killing Gene.
There is something horribly wrong with the bodies found in the dark city streets. Some are mutilated while others have the Price equation (wΔz = Cov (w,z) = βwzVz) carved into their flesh. Detective Eddie Argo and his new partner Helen Westcott unearth the meaning of the odd equation and realise each victim is being offered a gruesome choice: kill your loved ones, or be killed. Before long it becomes clear that the perpetrator has suffered a similar fate and is now coping by seeking a way to solve this philosophical dilemma.