Mo Wang and Mo Xian are twins worthy of the name, but their personalities are completely different. Perhaps the eldest brother has been very arrogant since he was born, but the younger brother has followed his brother around since he was a child. They were born and raised together and grew up wearing the same pair of pants (fog). They lived a carefree life, but at the age of 8, they experienced a major event that changed their lives. From then on, the two embarked on an unknown "detour" together...