In the depths of a Hokkaido forest in winter, the surface of Lake Shumarinai shimmers with the iridescence of snow crystals. The blanket of fine white powder also permits a number of hardy fish, including a giant "phantom" salmon, to flourish underneath. Few places on Earth get so bitterly cold - minus 41℃ - or have such heavy snowfalls - 25 meters a year. Special cameras (4K, thermo, underwater) reveal the structural beauty of the snowflakes and illuminate mysterious environmental phenomena. A fox "narrator" and 2 local schoolgirls give charming perspectives onto the wonders of a magical world.