The magic of Runeterra has strange side effects on those not accustomed to it. When Lulu follows Pix deep into the forest, she finds an unconscious, human stranger who she decides to turn into a Yordle for her own amusement. Little does she know that the magic is irreversible, and now the two of them must set off on a dangerous yet exciting journey to find a way to change him back and get him home safely.