In Vietnam, river warfare was often conducted in the dark. It was always dangerous, sometimes fatal - especially in the eastern end of the Viet Cong - plagued Mekong Delta. In 1967, U.S. Navy lieutenant Wynn Goldsmith was the "river rat" who led the first MK II PBR patrol boat in brutal combat.It was a deadly business. These sailors, famous for their courage and combat effectiveness, face sniper bullets, machine guns, and mines while searching sampans, patrolling treacherous enemy-controlled waterways like Ambush Alley, and rescuing crews from burning boats in the middle of firefights. During the Tet Offensive, Goldsmith's area saw some of the most hotly contested fighting in the entire Mekong Delta. This gripping account is a tribute to those brave men and their agony, sacrifice, and heroism.