I just beat the humilau city gym and met up with Hugh again. He said I need to go after team plasma on route 22. At the end of route 22, I met up with Team Plasma and they just blocked my way I couldn't fight them.
They talked about route 21. Where is route 21? Is it the area where you swim upwards in Undella Bay. If so that doesn't make sense to me that you would fight team Plasma while swimming. Is this the right way to go? I'm really stuck and don't know what to do. Please help.