With a string of unsolved murders up and down the Mississippi River, the FBI assembles a task force, assigning their best Minnesota field agent, Grace Ford, to partner with an agent from their Louisiana office. Despite their culture clash, the two must work together to traverse the country, crack the hardest cases—and to stop the next killer before it’s too late.
When a body turns up hanging from a bridge in Minnesota, Grace realizes it’s the signature of a new serial killer, obsessed with the river, and who will stop at nothing until he claims his next victim—unless she stops him in time.