A few days before the museum reopens, director Marie Losier is invited to be the first to re-enter and film her discovery of the place. During this night at the museum, she wanders from room to room and films the enigmatic creatures she encounters - animals, works, but also the artists and accomplices she has invited. These successive apparitions compose the scenes of a surrealist film that spectators can discover in a giant projection on the façade of the museum during an exceptional evening.