As a boy, Argent's sole duty as a food tester was to protect Princess Primula from being poisoned. Now, back in Beazol after a lengthy absence, he assumes a new role as the official royal pharmacist. But what happened in those years in between? This volume tells the history of Argent and the Princess. How did they meet? How did a friendship develop between a royal princess and a humble servant? And why did Argent leave the castle?