After two years at the St. Louis U.S. Marshal's office, Casey Sloane is tasked with escorting a reporter to Washington to testify before a grand jury. The reporter's research on an up-and-coming environmentalist who suddenly disappeared is now even more vital than anticipated.

At first, Casey's assignment seems routine. But a dangerous attack on the Marshal's office puts everyone on high alert. When Casey and the two other marshals--one a man from her past--are forced on the run with the reporter, they'll do whatever it takes to protect their witness and make it out alive.