Sugimoto's group head north on two dog sleds but become separated in a blinding snow storm. Sugimoto, Tanigaki, and Cikapasi reach the shoreline and they dig in to weather the storm using the dogs for warmth. Meanwhile, Koito, Ogata and Enonoka find shelter in a farmhouse. When the farmer returns, he shows them an old lighthouse on the property with a Fresnel lens beacon which can be seen from a great distance...