Private Investigator Archie Garrett returns to Mount Thomas to find a petty thief stealing personal items from the patients at a new detox centre. Jo Parrish and PJ accidentally come across Archie when they notice a woman running through the grounds of the centre, fleeing from an imaginary demon. When detox patients claim they've a seen ghost rumours of a murder at Layton Hall in the 1800s just fuel the gossip. A determined Jo pushes PJ to continue investigating the mysterious happenings at the detox centre in order to get to the bottom of the ghost story.