When three of Dr. Claire Donovan's patients describe the same nightmare — parks, water and deliberate movements — Claire assumes it's coincidence.

Until the visions start repeating.

At the same time, a series of murders surface across Boston. The victims: attacked during their nightly walks.

The nightmares grow clearer. A shadow in the dark. Footsteps drawing closer.

As Claire searches for answers, she begins to suspect that death can leave a trace.

And some patterns don't end with death.

London is a city that never stops moving.

Sirens echo through narrow streets. Rain slicks the pavement beneath the glow of streetlights. And every day, somewhere in the city, someone dies.

A car crash at a late-night intersection. A fire tearing through a corner shop. A sudden illness in a crowded restaurant.

Tragic. Unrelated. Easily explained.

Until something doesn't go as planned.

What begins as a routine investigation soon reveals something far more unsettling — a pattern hidden within deaths everyone else dismissed as ordinary.

Because if they're right, London isn't witnessing a series of accidents. It's witnessing a design.