Rattelique wants to become a Muscleteer. Surely, she just needs a brave deed? But being a hero is not enough to be a real Muscleteer…
Rattelique doesn’t want to stand in the shadow of her brother anymore. She wants to be a Muscleteer! She hatches a plan to convince the four of her courage - bravely helping Jolly Roger to cross a dangerous street. Now the Muscleteers take her in! But soon it becomes obvious that being a Muscleteer means much more than just being a hero - and the friends have to get shot of Rattelique.