Xie Yunyi, a king with a different surname who was both civil and military in the Dajing Dynasty, was strict and polite, wise and courageous. Due to a palace coup, he fell off a cliff and traveled to the filming location of the A-group of a large-scale modern costume drama "The Prosperous Dynasty". He regarded the highly restored set as a real "different world" and the crew as "indigenous residents" of this world, which resulted in a series of hilarious misunderstandings. His identity as a "real ancient" and the environment of "acting as an ancient" on the set formed a wonderful contrast.