https://wccftech.com/the-diamond-casino-heist-launches-december-12th-as-gta-onlines-most-complex-operation/

The Diamond Casino Heist is a new operation coming to GTA Online on December 12th. According to Rockstar Games, it'll be the most complex one ever introduced to the game thanks to an entirely different approach.

Something’s up at The Diamond Casino & Resort. Patrons have reported seeing unusual security patrols on the casino floor. Penthouse owners are receiving cryptic text messages from the Cheng Family Holdings Insiders have spotted unfamiliar blueprints on Agatha Baker’s desk, and visitors to their website are certain the intrusions there can only mean one thing: there’s a crew getting ready to take the whole thing down.