The era is the 1970’s. Big Boss had stationed his ‘’Soldiers without Borders’’ in Colombia, South America, there he was approached by visitors from Costa Rica, a nation without a military. In the wake of the Cuban missile Crisis, as Latin America became a key to maintaining the power balance between East and West, Costa Rica had miraculously managed to maintain its peace and neutrality. However, in various regions of the country, a mysterious armed forced seemed to be engaging in suspicious activities. Now to preserve peace in this nation without a military, the ‘’Soldiers without Borders’’ move into action.