Callum Carlisle is twenty-seven, the drummer of The Catalysts, and one of the few rockstars in a committed relationship. Standing at six foot two with sandy-blond hair, gray eyes, and a quiet, reserved demeanor, he often comes across as thoughtful and hard to read. Beneath that calm exterior is a chronic people-pleaser who struggles to balance everyone’s expectations. After forgetting his ten-year anniversary following a show and drinks, Callum returns home to a partner who’s finally had enough.