Petra Aster finds the amber copper tuning fork. The town erased everyone who touched it.
At the sleep language laboratory beneath Rook Coast, Petra Aster uncovers rain falling only indoors. A buried ledger proves the town exchanged children during the winter census.
On February 13, 1967, Petra Aster finds the amber copper tuning fork inside the sleep language laboratory.
The amber copper tuning fork carries Petra Aster's fingerprint beneath its surface.
At 1:17 a.m., Petra Aster records rain falling only indoors.
The recording predates Petra Aster's birth by forty years.
Then a dead technician asks Petra Aster to look underneath.
Beneath the amber copper tuning fork, Petra Aster discovers a numbered human tooth.
The number matches a locked cabinet in the sleep lab under Rook Coast.
Inside, Petra Aster finds payroll cards for people nobody remembers.
Each forgotten worker signed the same crooked surname as Petra Aster.
A fresh card lists Petra Aster's shift as beginning tonight.
The lights inside the sleep lab under Rook Coast turn violet one row at a time.
Every violet lamp reveals handprints moving beneath the floor while Petra Aster watches.
Petra Aster follows those handprints toward a door painted as concrete.
The door opens onto a copy of the sleep lab under Rook Coast filled with warm dust.
A clock in the copied room runs through February 13, 1967 again and again.
At each repetition, the amber copper tuning fork appears closer to Petra Aster's chest.
A ledger identifies the copied room as the witness nursery while Petra Aster watches.
The final ledger entry states that the town exchanged children during the winter census while Petra Aster watches.
Behind Petra Aster, a nursery cot begins rocking without a child.
The blanket rises. A smaller Petra Aster opens its eyes and points at the amber copper tuning fork.