Shot as if it were a documentary set in Mumbai, writer-director Ritesh Batra’s new film The Lunchbox, a hit in India where it was released last year, starts slow. But like the slow-developing romance at the heart of the film, it picks up to become a very elegant tale about unrequited love. The film follows Saajan (Irfan Khan), a factory worker who’s held the same claims department job for 35 years. An introvert who goes about his work with a quiet diligence, he doesn’t take kindly to the appearance of the well-intentioned but pesky Shaikh (Nawazuddin Siddiqui), the man he’s supposed to be train to be his replacement. But that’s just one of several changes that take place in Saajan’s life, disrupting the routine to which the man is wedded. The film screens tonight at 6:45 at the Cleveland Institute of Art Cinematheque. Tickets are $9. (Niesel)