Nineteen-year-old Connie Morgan works in the haberdashery department of a large Southampton store, and is in love with her married boss. But everything changes when she's swept off her feet at a local dance by dashing young car mechanic, Sam, who introduces her to the exciting new world of motor racing.
Having fallen head over heels for Sam, Connie is anxious to end her adulterous affair with John Baker. But John isn't going to let her go that easily, and Connie knows that if Sam ever finds out about her relationship with a married man, he will end everything, dashing all her dreams.