With the week of their wedding finally upon them, Washington, D.C., Police Lieutenant Sam Holland and her fiancé, Senator Nick Cappuano, are at odds. In the aftermath of a tragic loss, they struggle to reconnect as the big day draws near, but their work keeps pulling them apart. When a new clue into a cold case surfaces, Nick asks Sam not to take any foolish chances before the wedding and to leave it alone for the time being.