Reading from the Player's Handbook. If you pick a Sorcerer with the Draconic Bloodline you get a base AC of 13 (as long as you wear no armour, page 102). If you multi-class that with a Monk you get Unarmoured Defence which allows you to add your Wisdom modifier as well as your Dexterity modifier to your AC (as long as you wear no armour, page 78).
Would a Sorcerer (dragon bloodline)/Monk have an AC of 13 + Dexterity modifier + Wisdom modifier?
This seems pretty overpowered for a level 2 character if you get good rolls for your Wisdom and Dexterity (let us not forget to give some love to Charisma though!).