Don't deal with the devil.

When two brothers: Cuphead and Mugman travel to the far side of ink well isle 3 they find a casino owned by the devil, after a winning streak the devil confronts them and offers a deal, there souls if they lose and all the loot in the casino if they win, they took the chance and lost, after begging, the devil gave them a chance to save their souls by collecting other debtor's souls. Will Cuphead and Mugman make it? Find out in this book