In the summer of 1944, twenty-year-old Marlene is thrilled when her older, more glamorous cousin, Eva Braun, Adolph Hitler's mistress, invites her to come to the Fuhrer's Bavarian mountain retreat. Against her father's wishes, Marlene accepts and immediately sets forth to Berghof.

There, while Hitler is away desperately trying to turn the tides of war, Marlene finds herself in a strange paradise, a world of opulence and imminent danger, of freedom and surveillance. The two women sneak off and skinny-dip in a nearby lake, watch films in the Fuhrer's private cinema, and flirt with the SS officers at the dinner table - one of whom will become Marlene's first lover.

Initially delighted by Eva's attentions, Marlene later tries to understand the elusive connection between her cousin and the man she loves.