Character Relationship Map: Derailed

Characters

• Jin-il (played by Minho) — supporting

  Leader of a gang of four runaway youths surviving through petty crime and scams. Initially participates in schemes and betrays associates. Arrested and confesses alone to protect others. Kidnaps Hyeon...

• Ga-young (played by Jeong Da-eun) — supporting

  Runaway youth partnering with Jin-il in scams. Overpowers a client to steal a car but is later kidnapped and forced into a debt contract by Hyeong-seok. Held until Jin-il negotiates her release. Reuni...

• Bong-gil (played by Lee You-jin) — supporting

  Member of Jin-il's runaway youth gang. Participates in joint criminal schemes. During a failed scam involving fake stolen cellphones, he is accidentally stabbed by his own knife and subsequently taken...

Story Dynamics

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

• Ga-young → Bong-gil (Alliance Scam Teammate) — They cooperate as members of the same criminal youth group.

  Ga-young's first scam brings Bong-gil into the plan, and both boys are present when the client is overpowered and robbed.

• Jin-il → Bong-gil (Alliance Gang Teammate) — Jin-il leads Bong-gil within their group of runaway youths.

  Bong-gil is identified as a member of Jin-il's gang, and the two participate together in thefts and a failed cellphone scam.

• Jin-il → Ga-young (Alliance Scam Partner) — They cooperate in criminal schemes and later coordinate to secure Ga-young's release.

  Ga-young proposes a prostitution scam, and Jin-il joins her in luring clients and stealing from them.

Story Analysis

A runaway youth gang's survival schemes escalate into coercion, sacrifice, and an ambiguous rooftop fall.

Plot Progression

1. A Dangerous First Scheme — Jin-il's runaway gang survives through petty crime. Ga-young launches a scheme that ends with a stolen car and an unexpected recognition.
2. Debt Under Threat — The client abducts Jin-il and Ga-young and forces her into a work contract. Jin-il begins committing further crimes to repay the car debt.
3. Confession and Betrayal — A failed cellphone scam injures Bong-gil and brings the youths into police custody. Jin-il confesses alone and exposes the karaoke bar's criminal operation.
4. The Exchange for Freedom — After escaping custody, Jin-il kidnaps the client's daughter. He uses her as leverage to obtain Ga-young's release.
5. Fall at the Station — The gang conflict converges on a train station rooftop. Jin-il pushes his former associate over the railing and falls with him, leaving the outcome uncertain.