PlotSergeant Blast is stuck with Privates Oyl and Goon on an army exercise. They must land on a island on a rubber raft. Instead of taking it as serious army maneuvers, Olive and Alice think of it as a vacation.
This leads them to some troubles and to make Sergeant Blast wish that she was not in the Army with them. Private Goon thus destroys the rubber raft and they all become stranded on the island. It turns out that the island is none other than Goon Island, home of Alice's relatives.