Maud is convinced something horrible happened to her best friend, Elizabeth, but in her search discovers it may be entwined with another disappearance from her childhood. The answers seem within her grasp, but the onset of dementia keeps pulling them through her fingers.

Title from container. "SDH (subtitles for the deaf and hard-of-hearing) are a function of the disc and serve the same purpose as closed captions"--container. Based on the novel by Emma Healey.