"Inmu 2" is a psychological and supernatural anime that delves into themes of desire, guilt, and the human psyche. The narrative centers around a young man named Ryouichi Kurosaki, who becomes entangled in a series of disturbing and surreal events after encountering a mysterious woman named Saya. Saya possesses the ability to manifest the innermost desires and fears of individuals, often leading to chaotic and tragic outcomes. As Ryouichi interacts with Saya, he is forced to confront his own repressed emotions and dark secrets, which begin to surface in increasingly unsettling ways.

The story unfolds in a nonlinear fashion, blending reality with hallucinatory sequences that blur the line between dreams and waking life. Ryouichi's journey is marked by encounters with other characters who are similarly affected by Saya's powers, each grappling with their own inner turmoil. These interactions reveal the fragility of the human mind and the consequences of unchecked desires. The plot explores the psychological impact of guilt and the lengths to which individuals will go to escape their pasts.

Key characters include Ryouichi, who serves as the protagonist and primary lens through which the story is told, and Saya, whose enigmatic nature drives much of the narrative's tension. Supporting characters, such as Ryouichi's childhood friend and a detective investigating the strange occurrences, add depth to the story by providing alternative perspectives on the unfolding events. The series maintains a tense and atmospheric tone, with its focus on psychological horror and moral ambiguity.

Themes of redemption, the duality of human nature, and the consequences of one's actions are woven throughout the narrative. The story's climax brings Ryouichi face-to-face with the full extent of Saya's influence, forcing him to make a choice that will determine his fate and the fate of those around him. The series concludes with an open-ended resolution, leaving room for interpretation regarding the true nature of Saya and the ultimate impact of Ryouichi's decisions.