Thieves (2007)

Original title: Ladrones

The main character is a nameless boy (Juan Jose Ballesta) who was taught to steal wallets by his absent mother. He is able to do the trick effortlessly, using his "earnings" to survive while he looks for his mom. As he runs into an antique store owner, he might have found a trace that will lead to her. First, however, he will have to pull off a few "jobs" for the store owner, and he can't do it alone: enter a nameless girl (Maria Valverde) who gets to learn all the secret techniques the young boy has been using all his life.