This is a prequel to Psycho Detective so it is set in the 1980’s. It follows Pang Pak-chuen (Adam Cheng), a Taoist master and an university professor of philosophy who accepts three young men Cheung Hon-chung (Bryant Mak), Tsui Pak-keung (Brian Chan), and Szema Chi-chuen (Neo Yau) as his disciples. The four become famous ghost-busting fighters, and soon get recruited by the secret police unit “Seventh Assault Team” to solve a serious of supernatural cases. It was during this time when he meets the triad boss “Ghost Sing” (Michael Tao), who is also a traditional Chinese physician.