Carol Tyler chronicles her fraught relationship to her father, Charles, a WWII veteran, and how the war affected lives through both childhood and adulthood. You'll Never Know is also a tribute to servicemen and women, dramatising the traumatic effects of the war on the Greatest Generation and those who followed. Her father's memories are woven into her own, which span her Catholic, Midwestern childhood; her troubled marriage; her daughter's struggles and her efforts to care for her aging parents.