In the midst of the intense pursuit for the elusive Ainu gold, Saichi Sugimoto, known as 'The Immortal,' and Asirpa press on towards their goal. Asirpa's experiences with Kiroranke and Ogata Hyakunosuke reshape her purpose and resolve as they journey out of Russian territory. Their group attracts an unexpected companion while Toshizou Hijikata's team faces perilous encounters for the treasured skins. With all factions vying for supremacy, the formidable First Lieutenant Tsurumi awaits a fateful encounter with Asirpa, keeping his sinister intentions veiled in secrecy.