During the night of Hungry Ghost Festival, a group of young people gathered in Kowloon Walled City. They intended to film a short video for their online supernatural channel "Beyond the Invisible". Although a few accidents happened at the beginning, they insisted to film the show.

The members of the crew disappeared one after another. Also, the actress Kathy's behavior became very weird. Ah Lok can't help wondering if someone has inadvertently touched some taboos.

Although his doubts are overwhelming, Lok has no interest in it; all he wants is to find Kathy as soon as possible and take her away from here….