We are in Guarulhos in the 90s. Dinho, Sérgio, Samuel, Julio and Bento are typical boys of the time with little money and many dreams. They have no idea that the mocking and intelligent humor, so characteristic of the group of friends, will change their lives forever. From a few failed attempts to absolute success, in a short time, they became the biggest Brazilian musical phenomenon of the decade: Mamonas Assassinas.