I remember the fic being that Voldemort is Tom in the canon timeline and he is a student but the twist was Dumbledore was actually Grindlewald who polyjuiced as Dumbledore via his lemon drops and the plot was that Grindlewald was trying to be the master of Death and I think find Atlantis.

I’m not a 100% sure but if I remember correctly, Tom comes out from the diary and changes his ways or something like that and throughout the story he feels that Dumbledore doesn’t treat him like how he did back when he was a student in the 1900s.

I remember the story being quite a good one especially with the plot twist and its humour. Sadly I can’t remember the name of it and googling the plot doesn’t really seem to help.

All and any help would be appreciated, Thank you!!