A black moth witness has disappeared from inside The Night Archive.

Mara Keene was supposed to be safe. Hidden in a secure witness suite. Protected by locked doors, restricted access, and the organization built to keep women like her alive long enough to testify. But when Mara vanishes without a broken lock, without exit footage, and without a trace of struggle, the case should be impossible.

Tamsin Bell knows better.

The room may have been secure, but it was also controlled. Scheduled meals. Approved contacts. Soothing scripts. Locked doors called protection. To everyone else, it looks like Mara may have walked away. To Tamsin, it looks like someone used the same high-control tactics she barely survived—and taught a terrified witness to open the door herself.

Missing-persons investigator Gabriel "Gabe" Ortiz is called in to find Mara before her forced silence destroys the black moth case. Gabe knows how fast a living woman can become a cold trail. He wants to protect Tamsin from the danger closing around her, but every protective instinct risks becoming exactly what she fears most: another cage.

As the investigation leads from a safe suite to abandoned sanctuary houses, old missing-persons files, hidden Archive records, and a replica of the white room from Tamsin's past, the truth becomes devastatingly clear.

The Night Archive has a leak.

And someone inside its walls has turned survivor files into a weapon.

To save the girl who vanished twice, Tamsin and Gabe must learn to trust each other under pressure, expose the betrayal inside the Archive, and face a final room designed to make Tamsin disappear all over again.

This time, she refuses to be lost.