Aviva portrays the relationship between Eden and Aviva, and how conflicts and difficulties in balancing the masculine/feminine within themselves extend outward and challenge their connection. Each character is played by both a man and a woman; the film is narrated primarily by Eden’s female side. The theme of masculine/feminine duality extends to every aspect of their journey as a couple – from courtship, to marriage, to divorce, and finally into a deep friendship – exploring how each character’s gender balance (or imbalance) affects their lives.