As the initial snowflake lands gently, Nyanko-sensei naps on his cozy hot-water bottle alongside Takashi Natsume. Amidst his aunt's preparation of a comforting meal, Natsume ventures out for a stroll, embracing the snow and the frosty atmosphere. Yet, his tranquil walk is disrupted by a snowy yokai, sporting ebony eyes, in search of a radiant and snug object. With scant details in hand, Natsume embarks on a quest to assist in uncovering the spirit's coveted treasure.