Finds out he could inherit a dukedom if he kills all the people in front of him

When his mother eloped with an Italian opera singer, Louis Mazzini was cut off from her aristocratic family. After the family refuses to let her be buried in the family mausoleum, Louis avenges his mother's death by attempting to murder every family member who stands between himself and the family fortune. But when he finds himself torn between his longtime love and the widow of one of his victims, his plans go awry.

In the 15th century Richard Duke of Gloucester, aided by his club-footed executioner Mord, eliminates those ahead of him in succession to the throne, then occupied by his brother King Edward IV of England. As each murder is accomplished he takes particular delight in removing small figurines, each resembling one of the successors, from a throne-room dollhouse, until he alone remains. After the death of Edward he becomes Richard III, King of England, and need only defeat the exiled Henry Tudor to retain power.

Although several others are ahead of him in the line of succession, Richard of Gloucester is determined to gain the throne. Through deceit, manipulation, and murder, he does become King Richard III of England. But once he becomes king, he soon finds out that the many enemies he has made will make it very difficult for him to remain on the throne for long.

In Medieval England, a sadistic duke plots to kill off all the heirs to the throne so he can claim the crown for himself.