در دهه ۱۹۹۰ میلادی در سئول بازرسان پلیس مخفی به یک سازمان جنایتکار بزرگ، مسئول تجارت غیرقانونی مواد مخدر بین کره جنوبی، چین و ژاپن نفوذ میکنند و…
قسمت ۱
Detective Junmo goes undercover within Gangnam Union to probe an international drug trade.
قسمت ۲
Barely passing Gicheul's test, Junmo joins Gangnam Union and discovers an unexpected truth.
قسمت ۳
Euijeong's appearance puts the squad in trouble; Gicheul finds last night's attack suspicious.
قسمت ۴
The team seeks Eui Jeong's aid to assist Jun Mo in a crisis, which leads to a perilous love triangle.
قسمت ۵
Earning Gi Cheul’s trust, Jun Mo becomes anxious as he sees Gi Cheul making a move towards Eui Jeong.
قسمت ۶
The delivery accident jeopardizes the trade; Detective Hwang closely surveils Gangnam Union.
قسمت ۷
Haeryun shows interest in Junmo; Euijeong approaches Gicheul; Junmo takes an extreme measure.
قسمت ۸
Gicheul suspects Junmo; four people's irreversible decisions trigger a big crisis.
قسمت ۹
The battle with Jaegeon creates a crack; Junmo joins forces with Haeryun to resume the trade.
قسمت ۱۰
Jun-mo and Eui-jeong juggle duty and feelings. Hwang continues to meddle, and the final day arrives.
قسمت ۱۱
An accident halts the trade and a crisis approaches as Eui-jeong and Do-hyung worry about Jun-mo.
قسمت ۱۲
Gi-cheul and Jun-mo make their way to the final deal. Korea, China, and Japan prepare for the arrest.
