Taxi driver Kenneth Ma carries on the mission of the rock spirit Hubert Wu and embarks on a journey of conquering demons. He encounters the spirit of his childhood friend (Hubert Wu) and meets the demon-conquering siblings, Gloria Tang and Alex Mak. The demon's curse is a sore point for Kenneth's feelings towards doctor Mandy Wong. Later, Mandy meets a spirit (C Kwan), which finally awakens her memories from the ghost zone. After Moon Lau died for Kenneth, she became a guardian angel watching over him. She continues to yearn for earthly life and cannot depart. A child abuse case allows the demon to regain his powers. It turns out Hubert has been controlled by a secret demon force all along. When Kenneth learns the truth, he is forced to choose between friendship and conquering demons!