In the cover of night, drug smugglers try to evade US counter narcotics intelligence, but darkness doesn't stop the United States Coast Guard from taking down the suspects. In Oregon, surging high tides trap two hikers at sunset, forcing USCG Air Station Astoria to find them in the midst of miles of pitch-black mudflats and freezing temperatures. In the Florida Keys, rescuers search for a man reported struggling in the water and the rescue takes an unexpected turn.