Episode list

Detective Joon-mo goes undercover within Gangnam Union to probe an international drug trade.

Barely passing Ki-cheol's test, Joon-mo joins Gangnam Union and discovers an unexpected truth.

Eui-jung's appearance puts the squad in trouble. Ki-cheol finds last night's attack suspicious.

The team seeks Eui-jung's aid to assist Joon-Mo in a crisis, which leads to a perilous love triangle.

Earning Gi Cheul's trust, Jun Mo becomes anxious as he sees Gi Cheul making a move towards Eui Jeong.

The delivery accident has put the trade on risk, While Detective Hwang closely monitors the Gangnam union.

Hae-Ryeon shows interest in Joon-mo; Eli-Jung approaches Ki-cheol; Joon-mo takes an extreme measure.

Ki-check suspects Joon-mo. The four people's irreversible decisions trigger the biggest crisis.

The battle with Jaegeon creates a crack. Joon-mo joins forces with Hae-ryeon to resume the trade.

Joon-mo and Eli-Jung juggle duty and feelings. Hwang continues to meddle, and the final day arrives.

An accident halts the trade and a crisis approaches as Eui-jung and Dohyung worry about Joon-mo.

Ki-cheol and Joon-mo make their way to the final deal. Korea, China, and Japan prepare for the arrest.