Jonas Maxim, Viscount Wilding, suspects that someone is out there impersonating him. This revelation comes in the form of a very lovely young lady who invades his bedroom one night, apparently determined to murder him in his sleep. Usually he prefers to do more pleasurable things with a beautiful female guest than defend his life, but when he learns that Marianne Glass believes he impregnated her sister and abandoned her, he is both surprised and suddenly intrigued by this passionate, beautiful assassin.

Though she knew she could never actually kill him in cold blood, Marianne is still chagrined to be thwarted by the sinfully handsome Lord Wilding before she could force the truth from the blackguard. Overpowered and at his mercy, she is astonished when he offers to help her find the true culprit. Is he innocent, or is this just another ploy? If he is lying, she may well finish the job and do him in after all…