No Overflix. In 1959, Luan is appointed Commander of the Great Flood Operations and of Binh Duong's Security Corps, with full authority to stabilize this province. The Liaison Department of the Republic of Vietnam, under the support of the United States, send commandos to North Vietnam for reconnaissance. If the commandos successfully infiltrate, they will respond to South Vietnam with a tango. Tango No. 1 and Tango No. 2 have failed. What will become of the third tango?