Protector's Gambit

Dumbledore died in the months after Voldemort's disappearance and the survivors fail to piece magical society back together. Ten years later, Snape hatches a plan to replace Harry Potter with eighteen-year-old Nymphadora Tonks. With a target squarely on her back, how will this aspiring Auror deal with the danger from Voldemort's cronies while pretending to be the boy who lived?