For one day, 'Hullo' follows the lives of very unique people who live in the big city. Xavier, a successful business man dealing with a recent family tragedy, is forced to confront the reality that he is now truly alone. Lilly, a waitress at a small diner who is battling a failing marriage, questions her life decisions. And Femi, a foreigner beginning his pursuit of the American Dream, learns that everything comes with a price. On this day, a series of events will unfold that will intertwine their seemingly separate worlds and the worlds of others around them. This day will pose to each of them a most interesting question - What if one word could change your life - forever?