It's West Germany, 1958. A 15-year-old schoolboy, Michael Berg, is suffering a long bout of hepatitis. When he recovers he returns to the flat of a tram conductor, 36-year-old Hanna Schmitz, to thank her for taking care of him the day he fell sick. The two of them begin a secret affair that becomes a routine for months: after school and work, Michael would read to her, and then they would make love and bathe each other. Both of them fall in love.