Insane

A abducted young woman subjected to confinement and coerced treatment in a psychiatric hospital. She secretly records the abuses in a journal, showing resilience and a persistent drive to uncover the truth. Her arc centers on survival, memory, and the pursuit of justice.

An unnamed mother whose assets are used by powerful figures, becoming a victim of the hospital’s corruption. Her death later reveals the human cost of the conspiracy and the reach of those abuses.

A programming director who investigates the hospital’s fate after a fire. He uncovers Soo-Ah’s diary, links the hospital to a larger organ-trafficking scheme, and drives the public confrontation with power.

An orderly disillusioned by inhumane practices who becomes an ally to Soo-Ah, aiding in documenting abuses and planning an escape. He is heavily burned during the chaos and remains a key witness in the investigation.

The sadistic director who oversees torture and a criminal organ-trafficking operation. He fiercely protects the system until the final confrontation and dies amid the hospital’s destruction.

Soo-Ah’s boyfriend who becomes involved in the rescue plan. He is captured and subjected to horrific violence, dying as the hospital burns.

Police commissioner and hospital founder who uses manipulation to hide his criminal enterprise. He orchestrates the scheme and ultimately dies by suicide to avoid a life sentence after the hospital’s destruction.

A patient entangled in the facility’s corruption. She inadvertently triggers a fire, creating an opportunity for escape and highlighting the intensity of the hospital’s abuse.

The hospital head who presides over abuses and illegal activities from the top. He is central to the institution’s power structure and faces involvement in the crimes as the investigation unfolds.

A detective who becomes involved as the case gains public attention. He supports the investigative process as Nam-Soo uncovers the hospital’s reach and corruption.