Miep Gies, a young, carefree secretary, agrees to help her boss Otto Frank hide his family after the Nazis invade Holland. Summoning courage she didn’t know she had, Miep faces her first task: getting Otto’s teenage daughter Margot past a Gestapo checkpoint.

With the Frank family secure in the Secret Annex, Miep’s Jewish dentist asks if she knows of a place where he can hide. Overcome by the need to help just one more person, Miep finds new and more dangerous ways to evade the Nazis.

As laws against Jews intensify, two small children land in Miep and Jan’s care. While Jan forges his own ties to the Dutch Resistance, Miep distances herself from people she cares about, including her own family.

Miep is forced to choose between her morals and her best friend while the Franks celebrate Hanukkah in The Annex. As Jan’s involvement with The Resistance deepens, he must lie to protect the person he loves the most.

Miep and Jan’s marriage is tested when he ignores her plea to abandon a dangerous mission. After the Nazis suffer a huge blow at the hands of The Resistance, Jan must go into hiding while Miep fears for his life.

As Nazi crackdowns increase in Amsterdam, Miep must hide an innocent student from her new Nazi neighbor. When a desperate friend begs for help finding a way out of the city, Jan finds an unexpected ally and hatches a plan.