I'm not sure specifically as I haven't read or seen this 'The Late Bloomer' in detail. But usually in such a story, there would be the main character who is the late bloomer, perhaps a person who has been overlooked or underestimated in the beginning.
Well, without more information, it's hard to say exactly. However, in a typical 'late bloomer' story, the central figure is often someone who has been through a lot in life. It could be a person who had to overcome personal hardships like poverty or lack of education. And there could be other characters around them like colleagues in a work - related story, or classmates in an educational context, who contrast with the late bloomer's journey by achieving success earlier or by being obstacles to the late bloomer's development.