The Killer That Stalked New York

The Killer That Stalked New York also knoin as Frightened City is a 1950 film noir starring Evelyn Keyes. The film, shot on location and in a semidocumentary style, is about diamond smugglers who unknowingly start a smallpox outbreak in the New York City of 1947. It is based on the real threat of a smallpox epidemic in the city, as described in a story taken from a 1948 Cosmopolitan magazine article.

Feeling sick, Sheila nearly faints on the street, so a cop takes her to a local clinic. While there, she encounters a little girl and inadvertently infects her. Sheila is misdiagnosed as having a common cold, and she leaves and returns home. After the girl is admitted to the hospital, she is found to have smallpox.Meanwhile, Matt has been cheating on Sheila with her sister, Francie Lola Albright, and then attempts to take off without either of them when the diamonds finally arrive through the mail. Unfortunately for him, the fence cannot buy the diamonds because they are too hot. Matt will have to wait for ten days for the cash, so he cannot leave New York. Sheila confronts Francie, who kills herself afterward due to Matts betrayal of them both. This gives Sheila more reason to get revenge on him. ........

Source: Wikipedia