As educated and highly-cultured Montaigne, you are of course familiar
with the plot --
 Renaldo is the son of Vodacce nobility and Juliana is the daughter of
 a notorious pirate captain. They meet in a harbor city one day and
 fall in love. But their families struggle -- Juliana's father steals
 several valuable chests full of gold from Renaldo's family's ships,
 and hides them away in his lair. He is pursued and his ship sunk --
 as he lies on board dying, he makes Juliana promise to recover his
 treasure, not knowing Renaldo is of course also promised to recover
 the treasure. 

 Nevertheless, Renaldo helps Juliana seek it out and foil his family's
 pursuit, and there is a dramatic scene where they have just dragged
 out the chests and he holds off the two guards single-handedly as she
 makes her escape. But then, of course, having broken his word to let
 her escape, as honor requires, he takes poison, as honor requires. She
 returns to find him dying, he explains the situation, and then,
 distraut, she slays herself with her own dagger and the curtain
 falls.