Schmidt and Jenko hated each other's guts in high school. But life had arranged for them to become friends at the police academy. They could not be called the pride of their alma mater until fate threw a chance to change everything - they joined the department of secret service on Jump Street, which is headed by Captain Dixon. They swap their pistols and IDs for satchels and use their youthful looks as cover. Trouble is, today's teenagers are very different from what Schmidt and Jenko remember them as. The friends realize that all their knowledge about sex, drugs, and rock 'n' roll is fundamentally flawed. In addition, the guys realize that, despite the past years, they have not managed to completely eradicate their childhood complexes. Both of them will have to look into the eyes of their own fears and literally go back into the skins of teenagers.