So, quick recap. The Nephites in Zarahemla sent Ammon and a group of explorers to find the settlers who went back to the Land of Nephi. Long story short, they found them in bondage, paying tribute to the Lamanites. They needed to find a way out, ASAP.
The idea came from Gideon. He went to King Limhi and said, "Hey, you know how we pay a tribute of wine to the Lamanites every month? Why don't we try getting them drunk?" So Limhi, Ammon, and the others gathered everything together, and that night they gave the Lamanite guards an extra ration of wine. They slipped out of the Land of Nephi, and Ammon and his brethren led them back to Zarahemla.
Unfortunately, their flight meant the Lamanites went looking for them. They didn't find the people of Limhi, however.
They found Alma.
Fare thee well, friend!