Rain or shine, I'm going to steal my family's book back. And if Raleigh gets in my way... it's on.
― Sly Cooper, determined to claim what is his[src]
After passing through a small cave, Sly Cooper spotted to his right a large gate blocking the path to Raleigh's hideout. To get past it, he made use of his climb move on a nearby ladder, but upon doing so, he was halted by moving spotlights. Bentley warned him about how deadly these lights would become if the raccoon was to take one careless step, though Sly was not so intimidated. Before Sly continued on, Bentley directed him ahead to the first of his signal repeaters, which he had launched throughout Raleigh's fortress, that way he could checkpoint Sly's progress.
As Sly pressed on, he caught sight of a big blimp, which Bentley concluded to be Raleigh's hideout, according to his amphibio-positioning system. Sly noted that it looked more like a machine than a hideout, which Bentley agreed with, correctly identifying it as a storm machine. It was the source behind the continuous rainfall and shipwrecks in the area. Raleigh's desire for perpetual bad weather at his own hideout made no sense to both Sly and Bentley, but rain or shine, Sly was determined to reclaim what was rightfully his and take Raleigh down if he had to. He continued venturing across the island until reaching the end, where he found the first treasure key that would unlock the gate to Raleigh's lair.
The clues have led me to believe that the code for this vault is 7-9-2.