Publisher's Synopsis
The Doctor (Tom Baker) and Leela arrive in Victorian London to find that galactic war criminal Magnus Greel has created giant rats in the sewers and is sucking the life essence from young girls to sustain him in his search for his Time cabinet. Aided by Professor Litefoot and music hall proprietor Henry Jago, the Doctor must stop Greel (masquerading as the Chinese god Weng Chiang) and his servants Li H'sen Chang and killer doll Mr Sin.
