17 Again is a comedy about Mike O Donnell, the most popular boy in school. But he decided to give up his scholarship to start a new life with his girlfriend Scarlet. Twenty years later, "adult" Mike feels that life is not as good as he expected. He remembers his glorious past and wishes everything was as glorious as when he was 17. Then one day he wakes up and finds himself transformed into 17-year-old Mike... What will happen to 17-year-old Mike? Will he be able to adapt to his current life? Will Mike be able to return to himself?