For years Shelly Summer has buried herself in her work, trying to forget her past. The only time she feels truly herself is when she's diving in the Mediterranean - the calm and stillness of the clear waters help her forget.
Back home, Shelly stumbles across the belongings of her great-grandmother, Gertie Smith including a recording of Gertie's memoirs. As Shelly listens to it, she starts to uncover the secrets of Gertie's past, which might just hold the key to letting go of her own.