During her tour guide duties at the Louvre Museum, Cécile Gagnier encounters an unusual sight—a small white cat named Snowbébé amidst the crowd. This feline resident of the museum lives among a group of unfriendly cats but prefers this life to the streets. Despite remaining a perpetual kitten, Snowbébé possesses a unique ability to vanish into the world of paintings within the museum. Meanwhile, Marcel, a dedicated night security guard at the Louvre with a long history at the institution, has been haunted by his sister's mysterious disappearance years ago. Their childhood memories at the museum, where his sister claimed to hear the paintings speak, fuel Marcel's quest to find her. As fate intertwines their paths, Cécile, Snowbébé, and Marcel find themselves on an unexpected collision course that will forever alter their lives.