 In the late 40 s, the swindler Raymond Martinez Fernandez seduces lonely women to steal their possessions. When he meets the deranged Martha Beck, they fall in love for each other. With the jealous Martha posing as if she were his sister, the crook Ray seduces and kills other women. Two New York Detectives - Elmer C. Robinson and Charles Hildebrandt - chase the sociopaths, but without having the evidence of a body. In the end of 40 s, the couple is finally arrested and sentenced to death, being electrocuted in March, 1951 in Sing Sing.