The Order's Secret

After his encounter with Tom Riddle in the Chamber of Secrets, Harry is inducted into the Order of the Phoenix as a secret member answering only to Dumbledore, tasked with the discovery and destruction of Voldemort's Horcruxes. Follows canon when it suits me. Response to acepro Evolution's "Secret Member" challenge. Informed/Powerful!Harry, Mentor!Dumbledore. HP/NT