Mira Vale is packing up her childhood bedroom before moving away when she finds an old drawing she does not remember making.

The drawing shows little Mira standing beside a strange blue rabbit-like imaginary friend named Nono. At first, Mira thinks it is just an embarrassing childhood memory, but her mother confirms that Nono was once very important to her. Mira used to talk to him every day, especially when she felt lonely or scared.

That night, Nono appears in the reflection of Mira’s window.

He is not fully in the real world, but he remembers her clearly.

Mira tries to convince herself it was only a dream, but the next morning the drawing has changed. New words appear under the old promise:

YOU PROMISED.

Small impossible things begin happening around the house. A mark appears on the mirror. A spoon moves by itself. The box labeled OLD STUFF whispers Mira’s name.

As Mira investigates, forgotten memories start returning. She remembers being a little girl, afraid of the dark, and Nono staying beside her. She learns that Nono came from a mysterious place called The Library at the End of Childhood, where forgotten things wait.

By night, Mira follows Nono’s clues back to the old neighborhood playground. Beneath the red slide, the hidden door from her childhood drawing appears.

Nono waits for her there.

The chapter ends as the door opens, revealing the magical Library beyond.

Mira has forgotten Nono.

But the Library remembers her.