The main actors in this play are Joe, Kiku, Li He, Zhang Xinyuan, Liu Guanlin and Serena. It tells the story that in Chang 'an City in the Tang Dynasty, all the members of the investigation team with unique skills joined hands with Qi Xin to investigate the mysterious cases that occurred one after another.
The background of the story is that in 626 AD, Chang 'an, the capital of the Tang Dynasty, was suddenly filled with visions and mysterious cases, and people fell into panic. Dali Temple set up an investigation team to investigate these seemingly chaotic events in Machamp. Members include Samodo, who is familiar with Galo, Shangguan Ziwei, a "human version of mobile stacks", Li Zhi, a girl from Dali Temple with super analytical ability, a cannon who is good at making gunpowder and operating serial muskets, Sun Siniang, who is proficient in various weapons, and Tan, a medical genius.