First of all, you must have the necklace Georgia gave you on the deck. After that when you meet Charles on deck, say yes to visit the smoking room with him. He will tell you Georgia's necklace is fake. Say good bye and visit Sasha's cabin. Talk to the guy and he'll leave. Then shut off the power. Sasha will leave turn on the power and enter. You will find the Doll on his desk, simply much the numbers so they equal the number they are pointing to. Then open the thing up. Take the real ncklace and replace it with the fake. Then take it to the pursor.