A spiritualist contacts the ghost of a dead arsonist responsible for the death of a young girl at the same time that a new series of fires breaks out resembling his earlier handiwork.

Full recap: Charlie asks Jim to investigate Raoul Barnaby, a medium who has gained the favour of Roberta Jardine. Charlie and Roberta's niece, the scheming Pauline, believe that Barnaby is a conman. Barnaby claims to have been contacted by the ghost of a 12 girl who was killed in an arson attack 20 years previously. Soon the child's grave is desecrated and a similar series of arson attacks occur.

Jim is charged with a new investigation into the arson attacks and uncovers a link between Roberta Jardine and Jack Plimont, the detective in charge of the case. It appears that Jardine's son was the arsonist and commited suicide by immolation over the unintended death of the girl. Plemont helped to cover up the truth. Meanwhile Susan has sold the former home of the arsonist to Lil and finds ritual fire symbo