Eight Strings Mystery

Hello, I'm evalin. I play cello and love to read.
Hiiiiiiii I'm Pennelopy, call me penny if you must.
Oh um hi, I'm Charlie.
*checks hair* hi! I'm Jennifer! Nice to meet you!
I'm josh. Yeah. That's it.
What up guys? I'm mason!
*sighs* mason you're an idiot. I'm Julia by the way.
Yes my turn! I'm cole the ninja!
When 8 kids go to a new school for musical prodigies, they had no idea they would be solving the biggest mystery they had ever seen.