A dead biology graduate, a billionaire investor, a mysterious house and a rare beetle keep detectives Burkhard "Butsch" Schulz and Viola Delbrück busy this time as they finally investigate side by side again.

Summer 1989, East Germany. Adam works as a tailor, Evelyn as a waitress. They are planning a vacation together when Evelyn finds out that Adam is cheating on her and decides to leave for the holiday on her own.