New Delhi: His stories happen in a world where there is no evil but in his latest film 'Rockstar', director Imtiaz Ali has taken a detour to explore the "vulnerability and anger" that come with love.

The director, who has given lovable, relatable characters like Viren-Aditi (Socha Na Tha), Geet-Aditya (Jab We Met) and Jai-Meera (Love Aaj Kal), is himself surprised by the anger in 'Rockstar', which stars Ranbir Kapoor and Nargis Fakri.

"I have also asked this question to myself. It is an angry film but the anger does not come from me. It is not autobiographical in that sense; it must have come from my environment. It was an emotional and cathartic experience," Imtiaz said in an interview.

Another thing that is very unique to Imtiaz's direction is that his characters are mostly in transit and the director, who has a fascination for travelling to remote corners, says the physical journey in his films are indicative of the journey within.

"The physical journey in my films is indicative of the internal journey that my characters take. ’Rockstar' is again about Jordan's journey from being a gawky Hindu College student to becoming the rockstar. Coming from a small town, he later goes from place to place. From the mundane, the regular, he discovers what is spiritual and uplifting."

Imtiaz, 40, first tried to make the film in 2005 with John Abraham but when he picked up the story again, everything had changed and he wanted a younger lead. The director says he found his perfect rockstar in Ranbir.