Years ago, Lucas Davenport almost died at the hands of Clara Rinker, a pleasant, soft-spoken, low-key Southerner, and the best hitwoman in the business. She has retired and lives in Mexico with her boyfriend - the son of a local druglord. The boy is killed, but he wasn't the target . . . Clara was.
As she disappears to find the killer, Lucas is drafted by the FBI and other agencies to track her down, which he's happy to do, since his fiancée is deep in wedding preparations.
He has no idea what he's getting into . . .