Watch 37 Teen for Free: How to Stream the Movie Online at 123Movies. . Billionaire, software mogul, Adam Pi has everything in life with the exception of positive memories from High School. He begrudging goes to the 20th reunion and has such an amazing time he finds himself wondering "If I knew then what I know now" and offers the entire grad class one year's salary to come back and do one more month of the 12th grade.