I Plan to Become the Master of a Stolen Family

House Francesca holds a secret. There's an imposter within the house who seeks revenge. But who could it be? Is it the late duke's greedy sister who loathed sharing the riches of the duchy but loved spending them on herself? One of the duke's brothers, both of whom were hungry for the power that the duke held? Or could it be his daughter, who was under a spell to kill those who got in her way? Whoever it may be, can they keep their identity concealed, or will their dastardly deeds be revealed?