You are a young soldier who wants to become a glorious knight. To reach that, you have to pass the so-called "Knight Test": theoretical and practical tasks.
Your father, the Earl of Canterbury, sends you out into adventures to learn the needed skills. But he insists that you are accompanied by his military advisor, Sir Longarm (you call him just a "know-all").
When departure was approaching, your father gave you one final advice: "If you wanna be a good knight, do everything to lose none of your companions. I tell you again: Lose no single soldier!"
Then you left. But the last words of your father kept running through your head.