Someone has tried to take the life of Iceberg, mayor of Water Seven, and he's blaming Robin for the deed. But Robin has disappeared and left the Straw Hats under a cloud of suspicion! Now the crew members are on the run, looking for a way to clear their names. Could a mysterious group known as CP9 be to blame? Or is Robin really guilty?
Robin has suddenly left the crew, and her true intentions are revealed! There are reasons for her motives, but the crew is puzzled by her dealing with the secret government organization CP9. What will happen to the Strawhats and Robin, and just what is CP9 up to? Luffy will soon find out.