Lost Secrets (Big Hero 6 Fanfiction)

It's been 2 years since the Big Hero 6 fought their last villain, and everybody was going about their daily lives. Hiro, now a student at the San Fransokyo Institute of Technology still hadn't gotten over Tadashi's death, but preferred not to think about it. But when a new students comes to San Fransokyo offering a ticket to the Cavern of the Dead (A place where the dead were believed to stay), Hiro finds secrets that he never thought he would have found about his family and friends. But he couldn't trust this mysterious lady with the ticket... Could he?

This story WILL be edited many times, as I'm just writing as I think of ideas... And there will be little TadaHoney moments. Since this is my first fanfiction, please tell me how to get better at writing in general! Thank you!
~Su