Susan awakens in a top-secret government facility that houses monsters, where she meets General W.R. Monger, the Army officer in charge of the facility and her fellow monster inmates: Dr. Herbert Cockroach Ph.D., a scientist who became half-human, half-cockroach after an experiment gone wrong; B.O.B. (Benzoate Ostylezene Bicarbonate), a brainless and living indestructible mass of blue goo that is a result of a food flavoring mutation; the Missing Link, a prehistoric 20,000-year-old fish-ape hybrid who was thawed from deep ice by scientists; and Insectosaurus, a massive bug mutated by nuclear radiation standing 350 feet in height that attacked Tokyo, Japan.