Twenty years ago an airship Carrack name the Siren Song was task with delivering a gift treasure worth a Princess's ransom to Yakakastan during the trip the airship mysteriously crashed somewhere in the snowfields of the Crystal Empire. Many ponies have tried to find the crash site of the ill-fated Siren Song, but many have failed and died in the attempt. Those that have found the crash site don't return wealthy, but they return mad.