Or We Die Trying.

Three high schoolers investigate the disappearance of a fellow student, Aubrey. She was last seen entering the abandoned back hallways of their school, Asher Academies. There is a legend that the founder of the school, Asher Neal, died in the back halls and now his ghost haunts that half of the school, but no one believes that. However, as the team continues to investigate Aubrey's disappearance, the presence of a ghost seems more and more real.