During a mission to Robotropolis, Sally received a message she believed to be from her father, King Acorn. Nicole claimed that the source of the signal was in the Dark Swamp, so Sally and Antoine went there to investigate. Learning that Ironlock was the only known structure within the Dark Swamp, Sally directed the investigation there, despite Antoine's repeated suggestions that they should just go home to Knothole. When Sally and Antoine crossed the drawbridge, the wood finally gave out. Although they made it to the other side, the bridge deteriorated and fell into the chasm. When Sonic arrived later, he was forced to leap over the gorge to gain entry.