Marty McFly is a 17-year-old high school student who lives with his family in Hill Valley, California in 1985. One night, a scientist named Dr. Emmett Brown comes to Marty's house asking for his help. Dr. Brown has invented a time machine out of a DeLorean car and needs Marty to test it. However, things go wrong during the test and Marty is accidentally sent back to 1955.