 The main suspect is the woman who has sex with Marsh in the film, Rebecca Carlson, who after being charged with murder is represented by lawyer Frank Dulaney.As the trial begins, Carlson and Dulaney enter a sadomasochistic sexual relationship behind the back of Dulaney's unsuspecting wife.During their first sexual encounter, Frank, overcome by lust, notices too late that Rebecca is tying his arms behind his back using his own belt.