Germany, 1943: 26 year old Rosa Sauer's parents are gone, and her husband Gregor is far away, fighting on the front lines of World War II. One morning, the SS come to tell her she has been conscripted to be one of Hitler's tasters: three times a day, she and nine other women go to his secret headquarters, the Wolf's Lair, to sample his meals before he does. Forced to eat what might kill them, the tasters begin to divide into the Fanatics, those loyal to Hitler, and the women like Rosa who insist they aren't Nazis, even as they risk their lives every day for the Fuhrer. As secrets and resentments grow, the members of this unlikely sisterhood come into conflict, as everyone begins to wonder if they are on the wrong side of history.