Joker and Hachi come to hang out with Spade on his airship, where they find a picture from a young idol's concert. Incredibly, it turns out to be a picture of Pretty Ai, Dark Eye as a child. Back when Joker and Spade were just apprentice phantom thieves, they infiltrated an idol concert venue to steal a treasure and met Ai there. But the three are chased by the phantom thief Pumpkinhead, who is also after the treasure! They then try to work together to get rid of Pumpkinhead.