Iceland, the world’s northernmost country. In the dead of winter, a group of musicians from Hong Kong, led by Josie Ho and her band Josie & the Uni Boys, arrive in this snow and wind-swept nation to look for the most elusive thing on Earth — Happiness. They learn to abandon inhibitions and embrace discomfort in this land of fire and ice, not caring about looking silly while indulging in laughter and play. With local musicians, they take to the stage, the environment most familiar to them, and sing the theme song of Once Upon a Time in China.