A sci-fi story set on Mars in the future, THB features the adventures of HR Watson, a teenage girl, and her super-powered bodyguard, THB (whose name stands for Tri-Hydro Bi-Oxygenate, a fictional molecule created by Pope). THB resembles a small rubber ball carried around by HR Watson, but when activated with water, expands to take the form of a seven-foot (215 cm) super-powered man.