n Season 1, Lee Seung Gi plays Tang Sanzang (a Buddhist monk in the novel) who leads and worries constantly about the monsters hyungs (his co-cast members) who don’t listen to him. Lee Soo Geun plays Sun Wukong a monkey character with the greatest sin, Eun Ji Won plays Sha Wujing (a celestial being) who is either immature or genius villain, and Kang Ho Dong plays Zhu Bajie (a pig character) with low brain power but great strength and appetite. Together, they take a journey to the west (Xi'an, China) while completing various mission to find seven dragon balls which can grant wishes for those who can collect them. Na Young Suk PD expressed, “The four are too familiar with each other, and they know what each other is thinking just from looking at each other’s eyes. Everyone had a great and fun time during the 5 days four nights trip. We are working hard on the post-production at the moment, so that the viewers can experience the fun that we all had.” In Season 2 to 4, the show followed the similar concept as Season 1 as they travelled with new characters and new cast members to several parts of China and Vietnam to find the seven dragon balls. In Season 5, a total new sets of characters and theme (Ghost Special) were introduced as the cast members travelled to Hong Kong and Hokkaido.