A science class experiment at Torloch Towers school had gone terribly wrong. Out of a test tube had come a grotesque black cloud, which was capable of forming itself into different shapes. What was even worse, every time the thing appeared, people turned nasty. Three friends were desperately trying to think of something to put matters right.
Dark Days at Torloch Towers – Spellbound: #35 (21 May 1977) – #41 (02 July 1977)