Lee Mong-rong, Ko Jishik, Shin Jishik and Jangin, four scholars of the Joseon period, were always interested in the issue of gender equality. One day, while they were discussing this topic, they were suddenly transported to the 21st century.
Stepping into a strange and unfamiliar land, they met people who spoke a language that was difficult to understand but similar to their own, and their costumes were also very unique and revealing. Taking advantage of this rare opportunity, they decided to discover the deep secrets of the female body, something they could not do in their time. Join them on this wild and exciting journey.