Revenge At The Casino

Twenty years ago, you participated in a heist to steal the world's largest sapphire. Everything was going perfectly, but that was without counting on the betrayal of your teammates who left you behind. 20 years in prison is the sentence you took for this crime. After having served your sentence and recruited the most infrequent scoundrels, you intend to take revenge. You have learned that your former teammates have opened an underground Casino in which they brew a lot of money. The Sapphire in question would be hidden there. You also know that they went away for an hour on business. Not a second to lose, it's time to quench your thirst for revenge...