An act of love, or an act of murder?

When an elderly millionaire is found dead with cocaine in his system, his will leaves $8 million to Rebecca Carlson, who was having an affair with him. District attorney Robert Garrett decides to prosecute Rebecca, arguing that she deliberately engaged in wild sex with the old man to overexcite him and lead to his premature death. Defense attorney Frank Dulaney defends Rebecca in court while getting sucked into a dangerous affair with her.