Near Antigonish, Nova Scotia young Cameron and his parents are having a picnic. The bored boy wanders away and bumps into a tree which grabs him then the title rolls. At Torrington Academy Diana and Martin are both practicing their lame ideas for the school talent show when they're called to Centre with Java. They arrive to find MOM experimenting with a shrinking gun from a UFO that crashed in 1957. She stops the experiment to give them their mission, a local constable has reported that all Antigonish's 95 inhabitants have disappeared. As she talks Martin tries juggling items from her desk including the shrinking gun which he drops and which zaps MOM. She orders them out of her office and Billy tells MOM not to worry as some of his old clothes should fit her. In Antigonish they find the village filled with odd trees and Diana develops a crush on Angus, the constable who reported the disappearances.
Tous les habitants d'une ville d'Écosse ont disparu. Martin, Diana et Java découvrent l'histoire du Druide des ténèbres, un magicien diabolique qui a pris possession de l'esprit de Cameron, un adolescent de la ville...
Gairabé tots els habitants d'una petita ciutat d'Escòcia han desaparegut. En Martin, la Diana i en Java descobreixen la història del druida negre, un mag malvat entestat a venjar-se d'un poble que va fer servir els seus propis poders contra ell, convertint-lo en un arbre fa uns quants centenars d'anys! Per dur a terme la seva revenja s'apodera de l'esperit d'en Cameron, un vailet de la ciutat molt espantat que l'unic que desitja es retrobar-se amb els seus pares desapareguts.
