A contemptuous and self-serving immigrant, Clementi Sabourin (George Sanders) pulls himself up by his bootstraps by instrumenting a series of cons and seductions which bilk several very wealthy persons out of most of their money. Most of the action is related in a series of flashbacks after Sabourin's body is found dead in a Park Avenue apartment. Death of a Scoundrel is a fictionalized adaptation of the life and mysterious death of Serge Rubenstein.