The King of Calabria slew the ruler of Sicily and seized his throne. He would have imprisoned the popular Prince Philaster except that he feared an uprising. He made plans, however, to secure the succession of his house to the Sicilian throne by marrying his only child, Arethusa, to the powerful Prince Pharamond of Spain. Knowing that the dethroned Philaster would not avow his love for her, Arethusa confessed her love to him. Overjoyed, Philaster gave her his page boy, Bellario, to act as messenger between them while Arethusa should contrive release from her distasteful engagement.