Something has gone terribly wrong in Bangkok! At 12:00pm PDT tomorrow, July 27th, Global Mission: Betrayal In Bangkok begins, making it your job to uncover the traitors before Bangkok closes down.
You’ll have a week to complete the mission before you get booted out of Bangkok, during which you will receive 5X mastery for finishing jobs in the city. You’ll also get a chance to loot the new and rare weapon Iron and Silk (74 attack, 73 defense) from jobs and fights in the city soon to be closed.
You’ll need a few key items to finish Global Mission: Betrayal In Bangkok. You can request Forger’s Gloves from the Free Gifts page and ask friends to send you Pirates to finish jobs. If you’re successful in tracking down the traitors, you’ll earn yourself a Dragontongue weapon (151 attack, 60 defense) and escape Bangkok safely before it shuts down.
info from Official Mafia Wars Blog