Character Relationship Map: Cello

Characters

• Kim Tae-yeon (played by Park Da-an) — supporting

  Kim Tae-yeon was Hong Mi-ju's best friend and a talented cellist who became jealous when Hong Mi-ju was chosen as the main cellist. Hong Mi-ju caused the crash that left Kim Tae-yeon hanging over a cl...

• Jun-ki (played by Jung Ho-bin) — supporting

  Jun-ki is Hong Mi-ju's husband and a member of her household. He hires Ji-sook as a housekeeper, investigates Hong Mi-ju's disturbing behavior, and questions her connection to Kim Tae-yeon. After disc...

• Ji-sook (played by Lee Ju-na) — supporting

  Ji-sook is the new housekeeper hired by Jun-ki to work in Hong Mi-ju's home. She finds the unmarked cassette and later gives it to Yun-jin, helping the cursed music enter the household. She is eventua...

Canonical Relationships

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

• Ji-sook → Kim Tae-yeon (Meta Possessor And Vessel) — Ji-sook becomes the physical vessel through which Kim Tae-yeon's spirit acts.

  Ji-sook appears after the struggle and is revealed to be possessed by Tae-yeon's spirit.

• Jun-ki → Ji-sook (Professional Employer And Housekeeper) — Jun-ki employs Ji-sook to work inside the family home.

  Jun-ki hires Ji-sook as a new housekeeper for the household.

Story Dynamics

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

• Jun-ki → Kim Tae-yeon (Narrative Investigative Connection) — Jun-ki uncovers the hidden connection between the household crisis and Kim Tae-yeon.

  Jun-ki finds a college yearbook with Kim Tae-yeon's face cut out and asks who she was.

Story Analysis

A buried betrayal returns through music, hallucination, possession, and a repeating supernatural nightmare.

Plot Progression

1. The Cassette Enters — A cello tune triggers a devastating crash and an apparent nightmare. After waking, the former cellist returns home to a birthday gathering and a new housekeeper.
2. Omens Inside the House — Deaths, violent behavior, threatening messages, and recurring voices transform domestic life into a series of unexplained threats. A murdered relative and an altered yearbook deepen the mystery.
3. The Buried Friendship — Harassment escalates while the cassette continues to return. The former cellist finally explains her college history with Kim Tae-yeon and the crash that ended their friendship.
4. A Family Unravels — Hallucinations turn deadly as a child falls from the balcony and another body is hidden. Jun-ki discovers the truth, and the household collapses in violence.
5. The Beginning Repeats — A flashback exposes the former cellist's betrayal of Kim Tae-yeon. After self-inflicted resistance and a hospital awakening, the opening events repeat with a darker supernatural warning.