In a library hidden behind a waterfall of sleep, an old librarian named Alistair catalogues and cares for the world’s forgotten dreams, which are kept in glowing glass jars. His quiet life is disrupted when a small, frightened nightmare escapes its jar, casting shadows of anxiety throughout the serene archives. Alistair, with the help of a curious wisp of a forgotten laugh, must venture into the echoing halls of the library not to capture the nightmare, but to understand its fear and gently sing it back to a peaceful rest, proving that even the darkest dreams just need a little light.