简介：Amysteriousplague,thePurpleDeath,ravagestheearth.Dr.Zarkov,investigatinginhisspaceship,findsashipfromplanetMongoseedingtheatmospherewithdust.Sureenough,MingtheMercilessisuptohisoldtricks.Soit'sbacktoMongoforFlash,Dale,andZarkov,thistimewithready-madeallieswaiting:PrinceBarinofArboriaandQueenFriaofthefrozennorthernlandofFrigia;where,itsohappens,isfoundpolarite,antidotetotheplague.ButMingwilluseallhisforcestokeepourheroesfromthwartinghisplansofconquest...…