run (Aamir Khan) is a reclusive and lonely modern art painter. Shai (Monica Dogra) is an American banker who is on a visit to Mumbai. Munna (Prateik Babbar) is a washerboy also living near Arun and Yasmin (Kriti Malhotra). The movie is about these four characters from different class of society and how the lives of four characters are intertwined

Overview from themoviedb.org