A troop of Girl Scouts undertakes a summer canoe expedition along a winding creek, launching five new canoes under the captain's guidance. They navigate camps, by-stream currents and a dangerous rapid, face an accident that prompts rescues, explore an island, and encounter odd local characters and a Boy Scout who affects events. The trip tests their outdoor skills through searches, pursuits, a storm, and badge-earning tasks, and includes shoreside social episodes such as a house party and a tennis tournament. The narrative follows their practical problem solving, growing confidence, and strengthened friendships as they complete the voyage and attend a final canoe meet.