" Not being used to being wounded, the god of the underworld retires to Mount Olympus. When he can’t find the god of medicine, Asklepios, he asks one of his students to help him. This happens to be the talented god Paean. He heals the dishevelled deity by sheer talent and a new kind of medicine: a beautiful flower growing on Mount Olympus. Paean’s career as a doctor-to-the-divine is off to a great start! But, alas, there’s one problem: his teacher Asklepios is deadly jealous.
In an unexpected - but storywise very thrilling – twist Asklepios decides to murder his student to prevent further embarrassment. Zeus, finding the body of Paean, decides to honour the ambitious student by transforming him into the beautiful flower that saved Pluto’s life. And that’s why these flowers are now called “Paeonia” "
Find out more about the history of Peonies here