This piece is inspired by Lampecia y Febe, a painting by Antonio Muñoz Degrain. In it, the Spanish impressionist portrays the mythological transformation of two sisters into poplar trees, a punishment from the gods. The first movement conjures the river Eridanos, where their fate begins to unfold. A carefree melody drifts above a restless piano current, suggesting a sunlit surface disturbed by occasional shadows that hint at the tragedy ahead. The second movement marks the beginning of the metamorphosis. The music grows increasingly unstable, driving toward a violent, agonizing climax. The final movement opens with fragile, flickering textures that gradually intensify and culminate in a final eruption, a cry of anguish as the transformation is completed.