"Deep River" is a profound exploration of faith, suffering, and redemption, told through the intertwined narratives of four Japanese survivors of World War II. Each character carries their own personal trauma and guilt, leading them on separate spiritual journeys that converge at India's holy Ganges River. As they grapple with their pasts and seek forgiveness and meaning in their lives, the novel delves into themes of cultural clash, religious conflict, and the human capacity for love and understanding amidst pain.

This graphic novel follows the journey of a young, unruly Japanese swordsman in the 17th century, who embarks on a quest to become "invincible under the sun" after surviving a brutal battle that left most of his companions dead. Inspired by the life of a legendary historical figure, the protagonist's path is one of intense duels, personal growth, and philosophical exploration. As he travels, he encounters a diverse cast of characters, each contributing to his understanding of what it means to live and fight with purpose. The story blends visceral action with deep introspection, set against the backdrop of a beautifully rendered feudal Japan.