Mike retreats to the Greek Safehouse. You will go over your leads with Mina unlocking the Ronald Sung dossier.
Dossier: Ronald Sung
Next you will have the opportunity to specialize Michael, permanently increasing the ability cap for three of your skills based on your Character Level.
Afterwards, you will need to chose your next hub: Moscow, Rome, or Taipei. You'll be able to travel between these hubs at will so you are not locking yourself into a specific set of missions until they are all completed.
Whatever your choice, during your flight you'll meet Scarlet Lake and have your first chance to influence your reputation with her.
From here you will begin your mission to stop Halbech from starting an international conflict.