Greatest Days is the feel-good and universal story of love and friendship featuring the hit songs of Take That and adapted from the smash stage show by the writer of Calendar Girls. We follow five best friends who have the night of their lives seeing their favourite boy band in concert. Twenty-five years later their lives have changed in many different ways as they reunite for one more epic show by their beloved band, to relight their friendship and discover that maybe their greatest days are ahead of them.