Confused about an outlet
I have seen this hundreds of times. The problem is almost always in the first non-working outlet or the last working one! The very few that this has not been the case it has been in a junction box or breaker panel very rare! 

Go to the last working outlet--it may be a bad back stab feeding to the next outlet (quite common) or a broken wire usually because of a nick where the wire was stripped. Again, rare, but a possibility.