Accompanied by HANG and his staff, POK and a team of research assistants have arrived with a full set of equipment to carry out a thorough investigation at the reportedly haunted apartment. LAI and POK bring MAN to an ophthalmology center for an eyesight test, through which they find that the boy is able to see the light which cannot be detected by ordinary human eyes. Curious to know whether MAN can really see the dead, LAI and POK go to Lantau Island to look for a Taoist priest. On their way back, the pair get lost amid heavy rain. In the confusion, LAI trips and twists her ankle. Due to the geographical isolation of the area, they get very poor mobile reception and can hardly seek help by phone. POK takes LAI to a pavilion nearby so that she can have a rest. The following day, POK is shocked to discover that LAI has fallen unconscious due to the serious inflammation of her hand wound……