Submarine is a comedy film which tells a story of one 15 years old boy. Oliver Tate has two objectives: to lose his virginity before the next birthday, and to extinguish the flame between his mother and her former lover. Oliver really likes a mischievous little girl in his school - Jordana. He agrees to help her find a way to make her boyfriend jealous. They take a picture while they are kising, and put it in the diary and distribute it at school.