Embarked on a haunted glacier, and was immediately set upon by a blizzard man. We chased him off without too much damage, but a second one jumped us as we were carving out a meager shelter in the ice. This one killed most of our dogs, and in their thirst for vengeance a couple of dwarves chased him across the map, where he rallied and proceeded to chew them both apart, then came back for more. My axedwaf eventually took him out, but then went berzerk and had to be put down with a pick to the skull. During all this time I've barely managed to carve out a crude dormitory and stockpile, and haven't even been able to carry all my supplies inside let alone set up traps or a gate. After some more encounters with hostile wildlife I'm down to two dwarves, one of whom is crippled and bleeding out in the snow while the surviving miner frantically tries to make the fortress livable before he goes mad. Rakust is interrupted from his labors by a Yeti this time, and battles the giant beast amid clouds of miasma in the main hall of the fortress. He brings it down, but by now his one surviving companion has succumbed to melancholy and limps the halls murmuring and emaciated. He finally dies of thirst, and joins the many frozen corpses littering the landscape. Rakust labors on alone for a time, periodically succumbing to fits of rage and throwing about furniture and equipment. In his moments of clarity he carves out simple tombs for his dead brothers and builds coffins from jet mined below the layers of ice, but not fast enough - he is soon haunted by the ghosts of his unburied friends.
Choking on miasma, freezing, and harried by ghosts, Rakust finally succumbs to melancholy. Time passes. Soon a family of migrants arrive, evidently unaware of the doom that has befallen this colony. They find Rakust wandering the litter-strewn halls in rags, clutching a yeti skull and oblivious to the terrible ghosts that share his home.
Alas, due to a bug Rakust's expedition leader status didn't pass on to the new migrants (who only entered the scene AFTER he had gone crazy), so the colony was unmanageable without nobles. I stuck with the fortress long enough to carve out Rakust a proper tomb and inter him with his treasures before abandoning the place back to the snows.