After a matriarch’s death, the women in the family clean Grandma’s attic and find love and old memories packed away, and in the process, hit tunes that trace the history of black women, from the trials of the 1930s through the Girl Groups of the 60s to the empowerment of the 90s. Songs include “Oh, Happy Day,” “Mama Said,” “I Will Survive,” “Tyrone,” “I am Not My Hair” and “A Woman’s Worth.”