Girl a Meets Bracelet

Everything is normal for Riley. Normal life, normal friends, normal... well, everything. Until one day, when her mother shows her something- another thing that seems normal but does extraordinary things- what looks like a bracelet. With a single bell on it.
She means it as a just-because gift, but Riley soon finds out it's way beyond that. If they're nearby- if they want to be seen-, she will hear a tiny jingling in the bell, whether it's actually ringing or not. Finally deciding to ring it, she sees things if she told anyone else about, they'd think she was crazy- ghosts. People who are dead. Or so she thought.
With them, she learns things she never knew- secrets about people, secrets about the school, secrets about the past. Just when Riley's getting used to all of it, a voice starts ringing in her head, chanting something she can't understand. But when tragedy strikes, she has to understand why she was given this power once and for all.