Defenders of Justice

Mercy Brennan followed in her father's footsteps in a law enforcement career, but she has no interest in any other connection to him. A US Marshal in St. Louis, Missouri, she's assigned to a joint task force with the St. Louis PD that puts her back into contact with her father and in the sights of St. Louis's most powerful gang. When the gang has reason to believe Mercy has possession of some highly sensitive and incriminating information, her boss assigns Mark St. Laurent - a Deputy US Marshal and Mercy's ex-boyfriend - to get her out of town.

Kate O'Brien's quiet life in small-town Shelter Cove, Arkansas is shaken when her past suddenly comes roaring back to life. Four years ago, she and her twin sister were attacked by an elusive serial killer. Only Kate survived, and she's been in witness protection ever since. When new evidence arises to suggest the convicted man wasn't the murderer, she's subpoenaed to testify in the new trial. Afraid to go back into that world, Kate only agrees if Tony DeLuca, the deputy marshal who protected her during the original trial, escorts her to St. Louis.

Deputy US Marshal Casey Quinn has worked at the St. Louis marshals' office for two years and is given a routine assignment to help transport a reporter to D.C. to testify before a grand jury. Valerie, the reporter, was writing a story about an up-and-coming environmentalist who suddenly disappeared and, she later discovered, whose backers purportedly have ties to a terrorist.