Buenos Aires in the 1940s. Marta and Carlos María, cousins, grow up together like siblings in the Hilaire family. Wild childhood games on the expansive estate gradually evolve into more sophisticated pastimes. Growing up brings with it a new, confusing interest in each other. As the years pass, innocent childhood teasing transforms into a forbidden erotic tension of attraction and repulsion. When Rolando intrudes into Marta's and Carlos María's familiar world, the relationships seem to painfully clarify. Carlos María is torn between jealousy and heroic renunciation—until a mysterious letter from his father leads him to uncover a family secret.