After surviving a plane crash, Bollywood Actor Salman Khan (Salman Khan) meets a mysterious women ( Katrina Kaif) who narrates a story to him about 7 people.
Hello is centered around the events that occur overnight at a call centre. Shyam (Sharman Joshi), Priyanka (Gul Panag), Varun (Sohail Khan), Esha (Isha Koppikar), Radhika (Amrita Arora), Military Uncle (Sharat Saxena) and their boss, Subhash Bakshi (Dalip Tahil). Each have their own personal problems ranging from relationship issues to mother-in-law problems.
All this comes to a halt when a mysterious caller rings the call centre after his car is caught in a life threatening accident.