His Majesty's Auxiliary Ship Sparkle - the navy's laundry ship - is home to the rejects of the Fleet.

Midshipwoman Ophelia Branford is assigned there for her "middie" voyage.

Assigned to the ship commanded by her sister - Captain Owami Branford - which should never happen. Something is wrong. And it only gets worse when Ophelia decides to help make the cleaning quicker.

What seemed like a good idea now threatens the very existence of their star kingdom... perhaps even mankind.