Denise and Nik grew up in the '70s LA music scene. Nik—handsome and gifted, with a knack for songwriting—was a star on the rise. Denise, his sister, was his biggest fan. Now, fleeting success long behind him, Nik makes his art in isolation, painstakingly documenting his own work. Denise is his most devoted audience—sometimes his only audience. Then her daughter, Ada, decides to make...