Flying Phantom Ship

Hayato's home city is under attack from a gigantic robot. His parents are lying dead in the rubble and the only remaining friend is his dog. He ends up in the house of Kuroshio, the leader of the fight against the Phantom Ship and the most important person in the city. By complete accident, Hayato finds his way to an underground passageway. His life is now in great danger, and only he can stop the plans.