How do you Lose your Memory?!

This is just an experiment story. I haven't seen many of these so I thought why not make my own.
The story will follow the book series in order but I will be skipping son of Neptune for obvious reasons. I will also be changing some things around to fit the plot better. In no way do I own any images or videos (Unless i say) that will be used. Alrights of Heroes of Olympus belongs to Rick Roden