Several months prior to America's entry into World War Two, 16 year-old Victoria Hamilton is adopted by her uncle, Captain Ross Hamilton, after her parents die in suspicious circumstances. Captain Hamilton is the commanding officer of a USO company stationed in Washington; using his military connections he arranges for Victoria to join the company as a tap dancer. There she makes friends with fellow performers Pixie and Trixie Bell, a pair of 'vaudeville brats' billed as The Liberty Belles." All three girls are placed under the supervision of W.A.C. Lieutenant Betsy Ross, a former school teacher responsible for educating the Company's children.