Iris was her daughter. Iris had died six years ago, at the age of nine, from a rapid neurodegenerative failure that Elara, for all her expertise in neural mapping, could not stop.

Iris hadn’t just left a diary. She’d left a cure. A way to regenerate the very neurons that had failed her.

She clicked Extract .

Elara’s hand flew to her mouth. That was Iris’s lisp on the letter s . That was the way she paused before the word “Mama,” as if tasting the sweetness of it.