Can a boy of nine be a big brother, a father, a mother and a luminary all at once? For young Ayse, the answer is yes. In fact, as far as she's concerned, her big brother, Ahmet, is afraid of nothing at all. But the truth is, Ahmet is a child too; and he too has his fears. Equally, it's impossible for him to know everything. Their father, Kazim, has gone off to marry another woman and abandoned the two children to their fate with Hasan, their elderly and half-crippled grandfather. But in spite of everything, brother and sister never seem to lose hope. Based on a real-life story, MOMMO borrows its name from a make-believe horror character, a regional version of the bogeyman routinely invoked to intimidate young children. This simple tale of the relationship between a brother and sister in a small village portrays one of the grittier realities of Anatolia.