When legendary thief Keisuke "The Ace" Takamura gets caught in a hero summoning during his biggest heist, he finds himself trapped in a fantasy world... and he wants nothing to do with saving it.

Escaping the royal castle, he encounters Eleara, a Madjinn girl striving to become an Arcana Seeker. Despite being rejected by every guild for her lack of talent, Eleara is determined to raid the dungeons and find the truth behind the Legend of the 22 Arcana Cards.

"Collect all the Cards, and make any dream a reality."

Intrigued by the power of the Arcana and the challenges of the dungeon, Keisuke sees an opportunity too good to pass up. Now he must assemble a crew of misfits and show the world that there's more than one way to raid a dungeon - by robbing it blind.