So, both of them are criminals (obviously) and they are ordered by their boss - can be whoever - to find a certain artifact. They have to search all over the world to find it in a week, or they get punished. But the problem is, they can't get caught by any police or the government, even if they have to break some rules.
*shrugs* lol.
All you need is faith, trust, and a little bit of pixie-dust!
Remember: when people tell you something’s wrong or doesn’t work for them, they are almost always right. When they tell you exactly what they think is wrong and how to fix it, they are almost always wrong. — Neil Gaiman