A mysterious scourge strikes members of the Protectorate. It spreads to Earth and then to Mars leaving only Dodgers, Cadet and Marvin oddly untouched. It's up to them to reverse the plague's distinctive physical and mental effects.

Whilst on their way to a golfing holiday, Dodgers, Cadet and I.Q. Hi battle both the paranormal and their own paranoia onboard Dodger's haunted ship.