Rock On!! is a musical drama which revolves around the rock band Magik. The band comprises of four best friends – Aditya Shroff (Farhan Akhtar) as the lead singer, the guitarist Joe Mascarhenas (Arjun Rampal), the keyboardist Rob Nancy (Luke Kenny), and the drummer Kedar Zaveri (Purab Kohli). However, the band couldn’t make it big and fell apart due to some misunderstanding. Aditya leaves music and becomes an investment banker. Years later, the four friends reunite, and to fulfill their dying friend Rob’s wish, the four come together to perform one last time and embark on the journey they once left unfinished.