Plot Summary:Sankô is the typical loafer and sleeper who ignores his wife's complaints. One day, a neighbor pulls Sankô out of bed to show him a map showing an island in front of whose shores a ship carrying a treasure sank. Sankô the greedy will hasten to go in search of it, but as he plunges into the waters he runs into a severe problem: a giant octopus and his family inhabit the cave in front of which the treasure rests.