Character Relationship Map: Insane

Characters

• Kang Su-a (played by Kang Ye-won) — protagonist

  Kang Su-a is presented as a woman abducted and confined in a psychiatric hospital, where she secretly records the abuse and later faces arrest for murder and arson. The investigation eventually expose...

• Jang Hyung-sik (played by Choi Jin-ho) — supporting

  Jang Hyung-sik is the sadistic director of the psychiatric hospital and Kang Byung-joo's protege. He enforces the institution's brutal confinement and torture, participates in its criminal operation,...

• Mi-ro (played by Cheon Min-hui) — supporting

  Mi-ro is a patient at the psychiatric hospital and is exploited by Jang Hyung-sik as a sex slave. She accidentally starts the fire in his office while he is retrieving money from a safe, then helps Ka...

• Kang Byung-joo (played by Ji Dae-han) — supporting

  Kang Byung-joo is a police commissioner who founded the psychiatric hospital and placed Jang Hyung-sik in charge. He uses the institution as a front for organ trafficking and disappearances, manipulat...

• Woo-jin (played by Yoo Gun) — supporting

  Woo-jin is initially presented as Kang Su-a's boyfriend and is contacted by Dong-sik to help rescue the prisoners. He is captured during the failed attempt and appears to be dragged away by Jang Hyung...

• Dong-sik (played by Lee Hak-ju) — supporting

  Dong-sik is an orderly who becomes disgusted by the hospital's inhumane treatment of its prisoners. He contacts Woo-jin to organize a rescue, helps the captives during the crisis, and stays behind to...

• Su-a's mother (played by Kil Hae-yeon) — minor

  Su-a's mother is the family member whose assets are obtained through Kang Byung-joo's deception. The final revelation shows that she, rather than Kang Su-a, was the person actually confined in the psy...

Canonical Relationships

Family, romantic, and professional connections based on plot evidence.

• Su-a's mother → Kang Su-a (mother)
• Kang Byung-joo → Dong-sik (Power Institutional Superior) — Dong-sik is subordinate to the organization Kang created.

  Dong-sik works as an orderly in the psychiatric hospital founded by Kang Byung-joo.

• Kang Byung-joo → Mi-ro (Power Institutional Controller) — Kang's institution enables the coercive control imposed on Mi-ro.

  Kang Byung-joo founded the hospital that confines patients such as Mi-ro within its abusive system.

• Jang Hyung-sik → Dong-sik (Professional Supervisor And Subordinate) — Dong-sik works under the institutional system headed by Jang.

  Dong-sik is identified as an orderly working inside Jang Hyung-sik's psychiatric hospital.

• Jang Hyung-sik → Mi-ro (Power Sexual Exploiter) — Jang Hyung-sik abuses his institutional authority over Mi-ro.

  Mi-ro is described as one of the patients and Jang Hyung-sik's sex slave.

• Kang Byung-joo → Jang Hyung-sik (Professional Protector And Protégé) — Kang Byung-joo established the institution and elevated Jang Hyung-sik within its operation.

  The psychiatric hospital was founded by police commissioner Kang Byung-joo, and Jang Hyung-sik is described as his protégé.

Story Dynamics

Alliances, conflicts, and narrative interactions that evolve throughout the story.

• Kang Byung-joo → Woo-jin (Conflict Opposing Interests) — Woo-jin's rescue effort threatens the system linked to Kang.

  Woo-jin joins a rescue attempt against the psychiatric hospital, while the hospital is tied to Kang Byung-joo's criminal network.

• Jang Hyung-sik → Woo-jin (Conflict Murderous Enemy) — Their final encounter ends in lethal violence.

  After the fire, a heavily burned Jang Hyung-sik attacks and drags Woo-jin away, causing both of them to be burned to death.

• Dong-sik → Woo-jin (Alliance Rescue Collaborators) — They cooperate in an effort to challenge the psychiatric hospital.

  Dong-sik contacts Woo-jin to mount a rescue, and the two become involved in the failed attempt to free the captives.

• Dong-sik → Mi-ro (Alliance Rescue Ally) — Both oppose the institution and contribute to the escape effort.

  Mi-ro helps the captives escape after setting fire to Jang Hyung-sik's office, while Dong-sik attempts to rescue the remaining captives.

Story Analysis

A psychiatric hospital conspiracy is exposed, but the final identity reversals reveal that justice and truth are not the same.

Plot Progression

1. The Hospital of Silence — A woman is forcibly confined in a psychiatric hospital controlled by Jang Hyung-sik. Coercive medication, physical punishment, and secret documentation establish the institution's brutality.
2. A Rescue Through Fire — Dong-sik contacts Woo-jin to challenge the hospital, but the rescue fails and Woo-jin is tortured. Mi-ro's office fire creates a desperate chance for escape.
3. Ashes and Suspicion — The hospital burns, the survivors' accounts become uncertain, and a murder and arson suspicion follows. One year later, a broadcast investigation begins examining the ruins.
4. The Corruption Exposed — The investigation connects the hospital to Kang Byung-joo and uncovers an organ-trafficking and disappearance network. Public broadcasting pressures the hidden witnesses to speak.
5. Truth Behind the Notebook — Testimony and documents produce legal vindication, but the final revelations overturn the apparent identities and the notebook's ownership. The remaining secret is deliberately buried.