The plan of eighty-five-year-old Paulette seemed perfect: to play the role of an elderly woman going mad and make her son pay for her stay in a luxurious resort on the French Riviera. But he unexpectedly sends her to an unremarkable nursing home, lost in the outskirts of Paris.

The new resident has only one thing on her mind: to get out of this hole as soon as possible! No one expected that this seemingly harmless old lady would disturb the peace of this exemplary establishment. Her curious nature drives her to interfere in the lives of the residents of the nursing home, and no secret escapes her inquisitive mind. What do the mysterious letters found in Monsieur Georges’ room actually contain? And who wrote the strange notebook found in the library? One thing can be said for sure: these investigations will remarkably change the fates of the characters and Paulette herself.