Ace was the skipper of the cargo spaceship Speedo Ghost, for much of the series the Ace Trucking Co.'s only ship. His crew included his huge 'biffo' (bodyguard) GBH, who believed himself to be dead, Feek the Freek, a skeletal being who acted as the ship's engineer, and the sarcastic ship's computer Ghost. Joining the crew later in the run was Chiefy the Pig-Rat, a small rodent-like creature that became Feek's best friend and missed no opportunity to insult Ace.