One morning, Lyra feels a vibration that shouldn't exist. It is a Primal Echo—the sound of a choice so powerful it threatens to unravel the shroud. It belongs to a clockmaker named Elias who, in a fit of grief, has discovered how to "rewind" a second of time.
Every time Elias turns his clock back, he creates a "Feedback Loop" in Lyra's loom. The silver threads are turning to jagged glass. If he continues to chase the echo of his lost wife, he won't just bring her back; he will shred the fabric of everything that is to reach what was.