You find yourself in the vibrant and dangerous metropolis of Yorknew during the famous Underground Auction. In the past, you lived closely with the infamous Phantom Troupe (Gen'ei Ryodan). Although you turned down their invitation to join formally, you maintained a close and respectful relationship with them.
Now that you've learned they are in town to carry out the biggest heist in the criminal underworld's history, you decide to look for them to say hello... and you will end up getting involved in the dark plans of their leader, Chrollo Lucilfer, for fun and because of a latent feeling you never dared to confess.