Amsterdam, 1941. When the Nazis invade Amsterdam, singer Johanna Vos watches in horror her Jewish friends forbidden from performing with her onstage and the vibrant music scene she loves is all but erased. Alongside her friends, Johanna helps organize the Artists’ Resistance, an underground network that arranges for Jewish musicians to perform at house concerts hosted by their allies. When Johanna is told of a Jewish orphan headed for deportation, she does not think twice. She takes the baby in as her own, hiding the truth from everyone, including her sister, Liesbeth. Meanwhile, Liesbeth de Wit finds herself torn between her sister and her failing marriage. She knows her sister, Johanna, is a staunch supporter for the Resistance, while her husband, Maurits, aspires to a greater role within the Nazi party. When a charming member of the Dutch Fascist Party sets his eyes on Liesbeth, her predicament only deepens. As the war unfolds, secrets continue to grow between the sisters, severing their once-unbreakable bond. Eventually, both women are forced to make choices between family and freedom that will alter their lives forever.