In the late 19th century, on the remote and mystical island of Chiloé, a young Indigenous girl named Rosa lives a simple yet hardworking life alongside her father, laboring on a farm. The island, steeped in folklore and ancient traditions, is a place where the line between reality and the supernatural often blurs. Rosa's world is upended when the farm's foreman, a cruel and oppressive figure, brutally turns against her father, leaving the family shattered and desperate for justice.   Driven by a fierce determination to avenge her father and restore balance, Rosa embarks on a perilous journey. She seeks out the king of a powerful and secretive organization of sorcerers, a figure shrouded in mystery and feared by many. This clandestine group, rumored to wield dark and ancient magic known as "巫蛊之术" (sorcery or witchcraft), holds the key to the justice Rosa craves. As she ventures deeper into the island's hidden realms, she encounters a world of spells, curses, and otherworldly forces that challenge her understanding of reality.   Rosa's quest forces her to confront not only the foreman but also the darker aspects of human nature and the supernatural. Along the way, she must navigate treacherous alliances, uncover long-buried secrets, and harness her own inner strength. The film weaves a haunting tale of revenge, resilience, and the enduring power of tradition, set against the eerie and atmospheric backdrop of Chiloé's untamed landscapes and rich cultural heritage.