SEASON 1

Season 1 — The Red Thread

Five arcs. Each thread begins and ends inside its own arc card. Think of it less as one season cut into five, and more as five self-contained case files bundled under one season — no need to open them in order, and no need to buy all five. The five cases inside an arc share one suspect pool and one scene, running as a single story from start to finish, with the knot untied in the arc's final case. Each card shows ownership status and the price left to pay, so owned and unowned arcs are told apart at a glance. Partial ownership shows the price to fill in only what's left. Open a card below to see the five cases inside it.

ARC 1

The Missing Line

Five deaths in Seoha's wards and review rooms. Every hand followed the rules and the paperwork is spotless. Across five cases, learn how clean paper kills.

Not owned

Arc 1: no cases owned.

ARC 2

The Cure Was the Trigger

In four Danha recovery centers, equipment meant to save lives takes them. No hand can say what it did that night. Across five cases, find what moved them.

Not owned

Arc 2: no cases owned.

ARC 3

The Hand That Feeds

Parking towers, cold stores, car washes, charge bays. On Ullyeok's night shifts, one safety cutout fails and someone dies. Across five cases, ask why then.

Not owned

Arc 3: no cases owned.

ARC 4

Crossed Off

Sea fog over Haeryang Harbor. Anyone who threatens to report the placement office's ledgers is off the roster by dawn. Across five cases, follow the order.

Not owned

Arc 4: no cases owned.

ARC 5

The Borrowed Face

In midwinter Seolun the utilities' only voice is a handset. Inspectors die one by one; none who obeyed doubted it. Across five cases, count the voices.

Not owned

Arc 5: no cases owned.