Harry Hambridge is down on his luck and living in London. In one day, he loses his job, his father and his beloved pet hamster, Mouse. On returning home to bury his father, he finds a statement from his grandfather, claiming that it was he who raised the flag over the GPO during the 1916 Easter Rising, and that the flag now hangs upside-down in an army barracks in England. Too long used to the mockery of his life, he sets out with his motley crew to take back the flag and maybe find his passion for life along the way