In 2016, in the shadow of Manhattan's skyline, a killer stalks women undetected. But a quick-thinking friend, a final phone call, and a social media chat log point to a serial killer who may never have been caught.

Devout Mennonite Sasha Krause vanishes from her church parking lot in the middle of the night, investigators follow a series of unlikely digital clues across state lines to a gruesome discovery and uncover a killer with burning hatred.

When beloved teacher and mother-to-be Laura Wallen disappears before the first day of school, a seemingly innocent photo could be the key to unravelling an intricate web of deception and secret lovers that shatters a tightknit Maryland community.