A young servant named Anna Jurin arrives at the Saint Ange Orphanage in the French Alps in 1958, where she begins working with Helena while the orphans are relocated to new families. Anna, who is hiding her own pregnancy, forms a bond with the last remaining orphan, Judith, who has been left behind due to her mental health issues. As Anna gets to know Judith, she discovers that they share a unique ability - they can both hear the whispers and footsteps of invisible children. Determined to uncover the truth, Anna sets out to investigate the orphanage and uncover the secrets surrounding the mysterious, unseen children.

Saint Ange
In 1958, Anna Jurin, a young servant, accepts a position at the isolated Saint Ange Orphanage in the French Alps, tasked with preparing the orphanage for incoming families.