Looking forward to touring with her bandmates as the opening act for the world-famous Bad Boyz band, Nikki is horrified to learn that her frenemy, MacKenzie, is joining them as a social media intern and is assigned to be her roommate.

Finding unexpected joy in drumming, Melly is excited for her summer at Camp Rockaway, but a series of events leaves her with doubts about her performance readiness.

Lost in the Black Forest, Otto meets three mysterious sisters and finds himself entwined in a prophecy, a promise, and a harmonica--and decades later three children, Friedrich in Germany, Mike in Pennsylvania, and Ivy in California find themselves caughtup in the same thread of destiny in the darkest days of the twentieth century, struggling to keep their families intact, and tied together by the music of the same harmonica.