Ibiza, early nineties: Berlin-born music composer Jo (Max Riemelt) came to the island because he hopes to get a job in the new hot nightclub. In Ibiza he meets Martha (Marthe Keller), who has lived in seclusion in her house for 40 years. Slowly they become friends and are fascinated by the mysteries surrounding the woman. Martha claims not to be able to speak German, but when one day it turns out that she is fluent in German, Jo begins to question her and their relationship and reveals her secret.