Qin An, a modern teacher volunteering in a remote rural area, accidentally wanders deep into the Qinling Mountains in the Qin Dynasty. Lost along the way, he runs into Ying Zheng, who is traveling incognito. Mistaking the First Emperor for a village official, Qin An chats about modern development and introduces him to the rule of law. He astounds Li Si and Zhang Han by showing them his smartphone, and accidentally changes the fate of the Qin Dynasty.
