Set in the Republic of China era, the film follows Zhang Haike and Zhang Nian as they embark on a perilous adventure in the mountains. Their quest for an ancient silk manuscript leads them deep into the treacherous Gu Luo Cave, where they must navigate the darkness and face numerous challenges.

After surviving a perilous journey in Guluo, brothers Zhang Haike and Zhang Nian are thrust into a new adventure when Zhang Nian is kidnapped by the elusive Han Shuang. To secure his brother’s release, Zhang Haike must guide Han Shuang back to Guluo to uncover the legendary artifact known as the "Gong Ka," leading them into an intense and dangerous expedition through the snowy wilderness.