Character Relationship Map: Sector 7

Characters

• Cha Hae-joon (played by Ha Ji-won) — protagonist

  Main character and oil rig worker. Her uncle secretly conspires to breed a long-burning life-form for fuel. After the creature escapes and kills several crew members, she survives and fights alongside...

• Lee Jeong-man (played by Ahn Sung-ki) — supporting
• Cha Hae-joon's Father (played by Jeong In-gi) — minor
• Park Hyeon-jeong (played by Cha Ye-ryun) — supporting
• Jang Chi-soon (played by Park Young-soo) — supporting

Canonical Relationships

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

• Cha Hae-joon's Father → Cha Hae-joon (father)
• Lee Jeong-man → Park Hyeon-jeong (Professional Former Discovery Partners) — They jointly discovered the organism that became central to the fuel project.

  Lee reveals that he and Park Hyeon-jeong discovered the living organism decades earlier.

• Cha Hae-joon → Lee Jeong-man (Family Uncle And Niece) — Lee returns to the rig to support Hae-joon's effort to continue drilling, but she rejects him after learning that he secretly bred the dangerous organism.

  The reference says Cha Hae-joon calls Lee Jeong-man her uncle.

Story Dynamics

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

• Cha Hae-joon → Jang Chi-soon (Conflict Suspected Killer) — Hae-joon and the crew face uncertainty about Chi-soon's possible involvement in the death.

  After a woman is found dead, the crew suspects Jang Chi-soon, though the evidence and his behavior do not settle what happened.

Story Analysis

A determined offshore worker's renewed drilling effort becomes a fight to escape after a hidden organism turns the rig into a deadly trap.

Plot Progression

1. A Rig Refuses to Close — After a reference to an earlier drilling malfunction, Hae-joon resists the order to abandon the project. Lee returns, pledges responsibility, and helps secure another attempt.
2. A Promising Discovery — The crew resumes drilling and reaches a gas layer. They continue working together on the rig for months, but the reference provides no further detail about that period.
3. Deaths and Doubt — A woman is found dead, and the crew suspects Jang Chi-soon without resolving what happened. The doctor is killed, the woman's body disappears, and the survivors realize something dangerous is loose.
4. The Secret Beneath the Rig — Lee reveals that he and Park Hyeon-jeong discovered a living organism decades earlier and that he secretly bred one again when drilling resumed. Hae-joon is horrified and refuses to forgive him.
5. A Flight Without an Ending — With power down and creatures roaming, the survivors head toward a mini-submarine. Hae-joon volunteers to restore power, and the group is attacked; the reference ends before their fate is known.