Monsters don't always break in. Sometimes, they're invited . . .

Maddie likes her life orderly. She manages and lives in the block of flats her father owns. Control is how she keeps anxiety at bay. Then, elderly Greta moves in.

Greta is quiet, precise, frail, and unsettlingly observant. When Maddie mentions her studies and desire to be a writer, Greta offers something extraordinary: her story. A past shaped by survival in a concentration camp. The kind of story that demands to be heard.

Soon, Maddie becomes the keeper of Greta's history. At the same time, small things start to happen in the building. Objects move. Residents are unsettled. And Ross, Maddie's ex, turns up again. But Greta knows exactly how this story goes.

What to tell. What to leave out. And how to draw Maddie in.

As Greta's wartime accounts grow more disturbing, Maddie begins to realize that she isn't just being confided in. She's being asked to rewrite a very dark past . . .