The woman in Makenzie Cole’s bathroom mirror is wearing different clothes.

It starts small. A hair part on the wrong side. A ring on a bare finger. Makenzie is a forensic psychologist — she knows what it looks like when a mind begins to break down, and she knows how to explain away the inexplicable.

She is tired. She is stressed. She is wrong.

On the third morning, the woman in the mirror is wearing bruises.

Then the phone rings. A man’s voice, measured and unhurried, tells her the woman in the glass is real. That she was taken three days ago. That she has Makenzie’s face because she was made the same way Makenzie was made — in a classified experiment, in an abandoned research facility in the hills above Portland, before either of them could walk or speak or understand what was being done to them.

He calls it a fracture. He says only one of them can survive it.

Makenzie calls it something else: a sister she never knew she had.

The Signal and Its Echo is a psychological thriller about identity, memory, and the violence of binary thinking — about what happens when a dying man’s certainty collides with two women who refuse the choice he’s trying to force.

As forensic psychologist Makenzie Cole races to reach the Halverson Institute before a rogue scientist activates a machine thirty years in the making.

She and Caitlin Voss — strangers who share a face, a birthday, and a dream they’ve both been having their whole lives — must find a way to communicate across the impossible barrier between them.

The machine was designed for a resolution in one direction. The signal and its collapse. What it cannot account for is two people choosing each other.

Compulsively readable and quietly devastating, The Signal and Its Echo asks what we owe the people we were before we can remember being anyone.