"Sōshitsukyō" is a psychological thriller anime that explores themes of grief, guilt, and the supernatural. The narrative centers on a young man named Shizuo Mikage, who becomes entangled in a series of mysterious and unsettling events after the death of his childhood friend, Misaki. Misaki’s passing leaves Shizuo grappling with unresolved emotions and a sense of responsibility, as he believes he could have prevented her death. This guilt manifests in his recurring nightmares and hallucinations, blurring the line between reality and his deteriorating mental state.

The story takes a darker turn when Shizuo encounters a strange girl named Misaki, who bears an uncanny resemblance to his deceased friend. This new Misaki claims to be a "corpse" brought back to life through a ritual known as the "Corpse Resurrection," a practice rooted in occult traditions. As Shizuo becomes more involved with Misaki and her enigmatic world, he learns about the existence of other "corpses"—individuals who have been resurrected but are bound by supernatural rules and limitations. These resurrected beings are neither fully alive nor truly dead, existing in a liminal state that defies natural laws.

Shizuo’s journey intertwines with a group of individuals who are also connected to the Corpse Resurrection phenomenon. Among them is Tsugumi Shibata, a detective investigating a series of murders linked to the occult, and Yuuko Kanoe, a mysterious woman who seems to know more about the ritual than she lets on. As the plot unfolds, Shizuo uncovers the dark history behind the resurrection ritual, including its origins and the consequences of tampering with life and death. The narrative delves into the moral and ethical dilemmas surrounding immortality and the human desire to defy mortality.

The series builds tension through its exploration of psychological horror, with Shizuo’s perception of reality becoming increasingly unreliable. The boundaries between the living and the dead blur, creating an atmosphere of unease and suspense. The characters’ motivations and relationships are complex, with each individual grappling with their own traumas and desires. Misaki’s presence serves as a catalyst for Shizuo’s descent into the occult world, forcing him to confront his guilt and the consequences of his actions.

As the story progresses, the stakes escalate, leading to a climactic confrontation that challenges the characters’ understanding of life, death, and the afterlife. The series concludes with a resolution that leaves lingering questions about the nature of existence and the cost of defying natural order. "Sōshitsukyō" is a thought-provoking exploration of human fragility, the allure of the supernatural, and the consequences of seeking to transcend mortality.