They had a plan, formulated from before they were even born. That plan died. From its ashes rises a Harry Potter no longer willing, or able, to let others fight his battles for him. Outgunned, outclassed, outmatched, nonetheless Harry will take up the sword to change not only Britain, but the world.

At the end of 3rd year, Hermione asks Harry for some help with starting an interesting project. If a dark lord's got a 50-year head start on you, maybe what you need is a little more time to even the playing field. AU, Timetravel, HHr, mild Ron bashing. Minimizing new powers, just making good use of existing ones.