The six D’Aplièse sisters set out to find the mysterious seventh sister, whose identity is still unknown. A key clue, a star-shaped emerald ring, leads them on a global search across several countries.
As they follow different leads, they uncover the story of a woman connected to their family. The novel alternates between the present-day investigation and a historical storyline that reveals the true origins of the missing sister.
Through their journey, the sisters discover long-hidden family secrets, love stories, and sacrifices that explain who the seventh sister really is.