Some of the nobility tried to take advantage of Stevan's campaign to oust him from throne. Their leaders, Dukes Novak Belocrkvić and Nikola Zojić with help of Voivode Mihajlo, tried to show the failure of invasion of Bosnia to Bayezid I, as a result of Stefan's connection with the Hungarian King Sigismund and with recognition directly Bayezid I supreme power gain independence in lands of Prince Stefan. The exact course of further events is not precisely determined, but it is known that Stephen knew of the plot, since it was just reported by overlord Mihajlo. He was first invited to his castle duke Novak, who had estates in Toplica (probably the lands around that of Kuršumlija) and in the Hvosno (Crkolez village near Peć) and killed him. After that Belocrkvić, who had estates around the Rudnik, and his family ( wife and four daughters ) run to the established Ostrvica and became a monk, which he lost his possessions in Serbia, but he saved his life.