This movie is set on a crab processing place powered by the performance of [Tokyo Shio Kouji].
The crabs that appeared here are meant to dance for life.
Their death is not a biological death of an individual but the loss of ability to dance.
Even if turned edible the crabs are still able to continue dancing, however those who had their limbs scrapped off for canning loose their ability to dance.
How will they be able to stand up? the crab's battle of death begins.