Night at Goldmoss Post-house. Soyeon studies the Bell House manifest and the copied forged stamp mark by lamplight, preparing to confront Han Seojin.

Soyeon enters the magistrate compound using clerk errands as cover.

Soyeon finds Han Seojin alone in the archive, surrounded by official papers too large for him.

Soyeon confronts Seojin with the manifest and expects arrogance, but his fear is immediate.

Seojin breaks down. Soyeon realizes she is not facing a confident accomplice.

Seojin shows Soyeon ghost-stamped letters he has been hiding.

Seojin remembers the first ghost letter and Captain Yi taking control of the situation.

Back in the archive, Seojin admits how often he signed under pressure.

Soyeon explains what the forged marks prove and what they fail to prove.

Soyeon pieces together the laundering operation in plain terms.

Soyeon connects Magistrate Han Cheol to the profit stream through ledgers and caravan accounts.

Soyeon understands how Yi uses the watch and ghost-mail rumors to collect evidence before anyone else can read it.

Soyeon makes a plan to expose the chain through official records and tells Seojin what he must do.

Soyeon leaves the archive and runs into Captain Yi in the corridor.

Captain Yi's attention feels less like suspicion and more like selection. He hints at knowing Jun's vulnerability without revealing the full threat yet.

Soyeon checks on her brother Jun and sees how easily he could be targeted.

Back at the post-house, Soyeon commits to exposing Yi through the ledger despite the risk.

As Soyeon prepares to file the accusation, the relay sigil activates and a fourth ghost-stamped letter arrives.

The sigil forces acceptance. Soyeon opens the fourth letter.

The fourth letter reveals the cost of exposing Yi and turns future-Soyeon's warning into a murder notice.

Soyeon hides the accusation instead of filing it immediately, but she does not surrender. The chapter ends on the fourth letter's murder promise and the new moon deadline hanging over her.