Six red crosses on a hand-drawn map. Six unsolved deaths. And a retired cartographer who holds the key to everything.

When sixty-seven-year-old Margot Lindström receives an anonymous package at her quiet Beaverton home, she expects nothing more than a curiosity. Instead, she finds a map of Oregon ? and a trail of murder stretching back twenty years.

Each victim had ties to the cartographic firm where Margot built her career. Each kill site connects to someone she loves: her late husband, her mentor, her closest friends. Someone falsified survey maps to steal thousands of acres of public land, and six people died for discovering the truth.

Now Margot is discovering it too.

With a cold-case detective and a relentless journalist at her side, Margot races across Oregon ? from the storm-battered coast of Astoria to the volcanic silence of Crater Lake ? peeling back decades of deception. But the conspiracy isn't history. It's still breathing. Still watching. And the map's sender has one final secret that will shatter everything Margot believed about her marriage, her grief, and the man she loved.

Some maps don't show you where to go. They show you what's been buried.