Hupo and the Aletha love to amble through the bustling streets of their city, talking to shopkeepers and recounting tales of their favourite adventurer, the Great Humdingo - much to the annoyance of everyone around them. But when mysterious, zombifying mists creep into town and the Aletha is captured by a sinister force in the mountains, Hupo's on a mission to set everything to rights. But can he hold onto who he is when everything around him seems so terrible?