The Fourth Doctor, Romana II and K9 Mark II land on what the Doctor initially believes is Uthe 4 but K9 quickly corrects is Uthe 3. They find a world with lush vegetation but no apparent intelligent life. Much to Romana's surprise, the Doctor sends K9 off on a mission to find a Uthanian scatterbud, a rare flower that grows only on this planet. They continue on and stumble across a literal hole in the ground. Troy is a part of a small group tired of the war. He's been imprisoned because he tried to get to the surface to somehow find the enemy commanders and sue for peace.