Let me know what you think.

A girl was adopted but she doesn’t know. Until a guy and his sister show up at her school and seem mysterious as they show up wherever she is. Turns out the are from a different world the hidden world. They are called echolings that have special abilities. She discovers she is one too when she goes into initiation(when an echoling reaches an age receives their true powers). The girl finds out there is a secret jewel that only she knows where. But she doesn’t as her memories were erased by a witch. The jewel and her blood creates a death apocalypse in the real world. She must stop the people behind the evil as well as discover who she truly is.

Still needs a bit of development but that’s what I have so far. What do you think? Honest opinion.

Thanks.