Thirteen-year-old Holly Hobbie is an aspiring singer-songwriter who isn’t afraid to fight for causes she believes in, even if it ruffles feathers. She plans on saving the world some day, but is happy to start in her small town of Collinsville.
After finding out that her grandma’s café might have to close for good, Holly attempts to save the beloved family business by hosting an Open Mic.
Holly is jealous when she discovers that Amy and Piper are trying out for cheerleading together, so she tries to sabotage their developing friendship.
Holly, Amy and Piper must solve a crime to prevent the mayor from cancelling the Open Mic Night.