In a farming village in 1959 (Showa 34), Kayama Kazuma (Tomita Kaito) grew up in a poor family. He left home at 13 because he could not tolerate ill-treatment from his parents and lived hidden in a cave deep in the mountains. He became proficient at survival skills such as making bows and arrows, and catching rabbits and wild boars on his own. His beloved dog supported him through this lonely life. Several years later, a kind farming couple Sunagawa Yoshio (Inoue Jun) and Masayo (Kiuchi Midori) discover a man clad in animal fur living in a cave. He is the grown-up Kazuma (Nakamura Aoi). Kazuma starts to make contact with the world despite his confusion … --JDramas Weblog

衝撃の実話をドラマ化。わずか１３歳で家出をし、その後、山奥の洞窟に隠れ住み、４３年後に発見された男の人生を描く。自力でイノシシを狩ることを覚えた少年は、成長とともに山菜やランを売って金を稼ぐ知恵を身につけ、ホームレスから文字を学び、５０歳を過ぎて初恋を経験する。壮絶な人生にもかかわらず、どこかほほ笑ましくてどこか泣ける男の心温まる物語。