Avery Williams can sing, but that doesn't mean she can sing in front of people. She likes to stay backstage at her new school, which is where, to her surprise, she finds a cat tucked away into a nook. Avery names the stray Phantom and visits any time she's feeling stressed (which is a lot these days). As she sings to Phantom one day, her crush, Nic, overhears her and ropes Avery into auditioning for the school's musical. Despite her nerves, Avery lands the lead role! She knows she should be excited, but mostly Avery is terrified. Can Phantom help her through her stage fright? And what will happen if anyone finds out about her secret pet?