Henderson, York and Teal have arranged a meeting with the new planet of Queppu. The alien residents of Queppu haven't had any contact with the human race for some time and are excited at the prospect. Henderson's first rule, never to get romantically involved with a beautiful princess, is one which he breaks within moments of meeting the King's daughter who he quickly falls in love with. This leaves Teal deeply jealous and consequently their mission doesn't go to plan. Meanwhile, the ship has been left in sole charge of Technical Officer Jeffers, who takes the HMS Camden Lock for a spin!