Hartmut has been with Erika for over 40 years, but his wife has Alzheimer's and their memories together are fading. When they both visit their granddaughter's dance club, they hear songs from the seventies. Suddenly Erika is moving to the beat of the music as if she had never forgotten a dance step. And although she then falls back into her own world, Hartmut finds new hope. If he could manage to turn back time, he could bring back Erika, the love of his life.