Four Testaments

King Yeshua Graces of Rivertree is about to perish from a mortal fever. He has no sons or brothers, only four nephews. He must leave the eldest Oscarius in charge once he is gone. But a demon will visit the other three cousins, Alexus, Armandus, and Joshua. Tyring to convince them of killing one another in order to fulfill their own desires. However Joshua is tricked, instead he decides to fight this demon. But will he be able to save his family from murdering one another?