Moncada utilizes trickery to gain Juliana 's favor which Diego and Bernardo investigate .
Diego 's main adversary for the affections of Juliana is Rafael Moncada , the nephew of Dona Eulalia .
nephew utilizes trickery to gain Juliana 's favor which Diego and Bernardo investigate .
Diego 's main adversary for the affections of Juliana is Rafael Moncada , the nephew of Dona Eulalia .