Tammy is a young girl who lives with her grandpa in a houseboat on the Mississippi River. But when a plane crashes in the swamp, Tammy saves the pilot Peter Brent and falls for him.
After Tammy's sweetheart goes to agricultural college, she decides to attend college as well. She later finds herself working for a grouchy old lady while she falls for a handsome man.
As Tammy tries to support her elderly friend Mrs. Call as she goes into surgery, she takes a job as a nurse's aide at the hospital, only to fall for the dashing doctor.
The 17-year-old Tammy goes through experiences that may be well over her age. As she gets a job as a secretary, she fights to get back the house she lost as she falls in love.