Tom Riddle Harry Potter Chamber Of Secrets. The second plot started with former Hogwarts student Lord Voldemort once known as Tom Riddle locating anew the Chamber of Secrets and the monster within. His fifth-year memories are preserved in a diary that eventually makes its way into Harrys hands.
The plot culminated in the Petrification of several students and Harry Potter and Ginny Weasley being almost killed. Tom Riddle opened the Chamber of Secrets in June 1943 but it was unknown precisely which day possibly the same day that he caught Hagrid from talking with Aragog or the day before. The discovery of a past students diary leads Harry to encounter the mysterious Tom Riddle.
Hagrid again was framed and sent to Azkaban.
Hagrid again was framed and sent to Azkaban. I knew it wouldnt be safe to open the Chamber again while I was still at school so I decided to leave behind a Diary preserving by 16-year old self in its pages so that ond day I would be able to lead another to finish Salazar Slytherins noble work. Tom Riddle was a student at Hogwarts fifty years prior to Harry. Later Ginny having seen the diary amongst Harrys books stole the diary from among Harrys room in the Gryffindor Boys Dormitory.