Francisco de Orellana and his expedition team has discovered the entire Amazon River, and has reached the river mouth to the Atlantic Ocean. However, the Spanish explorers are facing native cannibals, known as "Negros". Besides that, there are fellow Spaniards being captured by the Negros, whom the player should free them and get their service. The player is to gather the necessary resources to build 15 galleons before embarking on the journey into the ocean.